Arctic Oscillation (AO)
The Arctic Oscillation (AO) is a large scale mode of climate variability, also referred to as the Northern Hemisphere annular mode. The AO is a climate pattern characterized by winds circulating counterclockwise around the Arctic at around 55°N latitude. When the AO is in its positive phase, a ring of strong winds circulating around the North Pole acts to confine colder air across polar regions. This belt of winds becomes weaker and more distorted in the negative phase of the AO, which allows an easier southward penetration of colder, arctic airmasses and increased storminess into the mid-latitudes.
AO index is obtained by projecting the AO loading pattern to the daily anomaly 1000 millibar height field over 20°N-90°N latitude. The AO loading pattern has been chosen as the first mode of EOF analysis using monthly mean 1000 millibar height anomaly data from 1979 to 2000 over 20°N-90°N. For more information on the AO, please see CPC's AO page.
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| Date | AO |
|---|---|
| 195001 | -0.060 |
| 195002 | 0.627 |
| 195003 | -0.008 |
| 195004 | 0.555 |
| 195005 | 0.072 |
| 195006 | 0.539 |
| 195007 | -0.802 |
| 195008 | -0.851 |
| 195009 | 0.358 |
| 195010 | -0.379 |
| 195011 | -0.515 |
| 195012 | -1.928 |
| 195101 | -0.085 |
| 195102 | -0.400 |
| 195103 | -1.934 |
| 195104 | -0.776 |
| 195105 | -0.863 |
| 195106 | -0.918 |
| 195107 | 0.090 |
| 195108 | -0.377 |
| 195109 | -0.818 |
| 195110 | -0.213 |
| 195111 | -0.069 |
| 195112 | 1.987 |
| 195201 | 0.368 |
| 195202 | -1.747 |
| 195203 | -1.859 |
| 195204 | 0.539 |
| 195205 | -0.774 |
| 195206 | -0.441 |
| 195207 | 0.383 |
| 195208 | -0.030 |
| 195209 | -0.383 |
| 195210 | -0.437 |
| 195211 | -1.891 |
| 195212 | -1.827 |
| 195301 | -1.036 |
| 195302 | -0.249 |
| 195303 | 1.068 |
| 195304 | -1.256 |
| 195305 | -0.562 |
| 195306 | 0.023 |
| 195307 | 0.333 |
| 195308 | 0.085 |
| 195309 | 0.662 |
| 195310 | -0.194 |
| 195311 | 0.354 |
| 195312 | 0.575 |
| 195401 | -0.148 |
| 195402 | -0.181 |
| 195403 | 0.476 |
| 195404 | 0.512 |
| 195405 | -1.656 |
| 195406 | -0.268 |
| 195407 | 0.341 |
| 195408 | -0.122 |
| 195409 | 0.301 |
| 195410 | 0.513 |
| 195411 | -0.328 |
| 195412 | 0.553 |
| 195501 | -1.163 |
| 195502 | -1.542 |
| 195503 | -1.568 |
| 195504 | 0.194 |
| 195505 | 0.242 |
| 195506 | -0.266 |
| 195507 | 0.332 |
| 195508 | 0.760 |
| 195509 | 0.357 |
| 195510 | 0.099 |
| 195511 | -1.342 |
| 195512 | -0.444 |
| 195601 | -1.204 |
| 195602 | -2.029 |
| 195603 | 0.470 |
| 195604 | -0.868 |
| 195605 | 1.391 |
| 195606 | 0.280 |
| 195607 | -0.215 |
| 195608 | -0.652 |
| 195609 | -0.202 |
| 195610 | 1.139 |
| 195611 | -0.066 |
| 195612 | 0.001 |
| 195701 | 2.062 |
| 195702 | -1.513 |
| 195703 | -2.013 |
| 195704 | 0.238 |
| 195705 | -0.966 |
| 195706 | -0.760 |
| 195707 | -0.646 |
| 195708 | 0.097 |
| 195709 | -0.956 |
| 195710 | 0.903 |
| 195711 | -1.380 |
| 195712 | 0.828 |
| 195801 | -1.438 |
| 195802 | -2.228 |
| 195803 | -2.522 |
| 195804 | -0.360 |
| 195805 | -0.336 |
| 195806 | -1.149 |
| 195807 | -0.684 |
| 195808 | -0.755 |
| 195809 | -0.012 |
| 195810 | 0.770 |
| 195811 | -0.011 |
| 195812 | -1.687 |
| 195901 | -2.013 |
| 195902 | 2.544 |
| 195903 | 1.432 |
| 195904 | 0.119 |
| 195905 | -0.341 |
| 195906 | -0.033 |
| 195907 | 0.105 |
| 195908 | -0.745 |
| 195909 | -0.281 |
| 195910 | -0.249 |
| 195911 | -1.411 |
| 195912 | -0.042 |
| 196001 | -2.484 |
| 196002 | -2.212 |
| 196003 | -1.625 |
| 196004 | -0.297 |
| 196005 | -0.857 |
| 196006 | 0.055 |
| 196007 | -0.619 |
| 196008 | -1.008 |
| 196009 | -0.382 |
| 196010 | -1.187 |
| 196011 | -0.553 |
| 196012 | -0.343 |
| 196101 | -1.506 |
| 196102 | 0.621 |
| 196103 | 0.341 |
| 196104 | -0.237 |
| 196105 | 0.157 |
| 196106 | 0.837 |
| 196107 | -0.108 |
| 196108 | 0.013 |
| 196109 | 0.815 |
| 196110 | 0.203 |
| 196111 | -0.010 |
| 196112 | -1.668 |
| 196201 | 1.645 |
| 196202 | -0.358 |
| 196203 | -2.848 |
| 196204 | 1.169 |
| 196205 | 0.068 |
| 196206 | 0.287 |
| 196207 | -0.927 |
| 196208 | 0.152 |
| 196209 | -0.056 |
| 196210 | -0.016 |
| 196211 | -1.112 |
| 196212 | -0.711 |
| 196301 | -3.311 |
| 196302 | -1.721 |
| 196303 | 0.724 |
| 196304 | -0.348 |
| 196305 | 0.771 |
| 196306 | -0.585 |
| 196307 | -0.303 |
| 196308 | -0.625 |
| 196309 | 0.083 |
| 196310 | 1.069 |
| 196311 | -0.419 |
| 196312 | -1.178 |
| 196401 | 0.385 |
| 196402 | -0.575 |
| 196403 | -0.558 |
| 196404 | 0.663 |
| 196405 | 1.174 |
| 196406 | 0.142 |
| 196407 | 0.734 |
| 196408 | -1.207 |
| 196409 | -0.227 |
| 196410 | 0.342 |
| 196411 | -0.344 |
| 196412 | -0.246 |
| 196501 | -1.046 |
| 196502 | -2.084 |
| 196503 | -0.905 |
| 196504 | 0.568 |
| 196505 | -0.153 |
| 196506 | 0.038 |
| 196507 | -0.510 |
| 196508 | -0.255 |
| 196509 | -0.698 |
| 196510 | 0.394 |
| 196511 | -1.341 |
| 196512 | 0.163 |
| 196601 | -3.232 |
| 196602 | -1.438 |
| 196603 | -0.911 |
| 196604 | -1.837 |
| 196605 | 1.124 |
| 196606 | 0.408 |
| 196607 | 0.011 |
| 196608 | -0.945 |
| 196609 | 0.011 |
| 196610 | -1.077 |
| 196611 | 0.111 |
| 196612 | -1.401 |
| 196701 | -0.576 |
| 196702 | 1.180 |
| 196703 | 1.967 |
| 196704 | 1.700 |
| 196705 | 0.127 |
| 196706 | 0.647 |
| 196707 | 0.259 |
| 196708 | -0.293 |
| 196709 | 0.133 |
| 196710 | 1.299 |
| 196711 | 0.334 |
| 196712 | -0.347 |
| 196801 | -0.409 |
| 196802 | -2.154 |
| 196803 | 1.741 |
| 196804 | 0.328 |
| 196805 | -0.241 |
| 196806 | 0.420 |
| 196807 | -0.836 |
| 196808 | -0.671 |
| 196809 | -1.009 |
| 196810 | -1.013 |
| 196811 | -2.183 |
| 196812 | -0.783 |
| 196901 | -2.967 |
| 196902 | -3.114 |
| 196903 | -1.582 |
| 196904 | 0.438 |
| 196905 | -0.720 |
| 196906 | -0.348 |
| 196907 | 0.410 |
| 196908 | -0.782 |
| 196909 | -0.083 |
| 196910 | 0.098 |
| 196911 | 0.326 |
| 196912 | -1.856 |
| 197001 | -2.412 |
| 197002 | -1.325 |
| 197003 | -2.084 |
| 197004 | 0.302 |
| 197005 | 0.531 |
| 197006 | 0.875 |
| 197007 | 0.139 |
| 197008 | -0.263 |
| 197009 | 0.030 |
| 197010 | 0.098 |
| 197011 | 0.378 |
| 197012 | -0.399 |
| 197101 | -0.163 |
| 197102 | -0.922 |
| 197103 | -1.091 |
| 197104 | -0.583 |
| 197105 | 0.679 |
| 197106 | -0.668 |
| 197107 | -0.578 |
| 197108 | 0.818 |
| 197109 | 0.153 |
| 197110 | 1.185 |
| 197111 | 0.419 |
| 197112 | 0.824 |
| 197201 | 0.166 |
| 197202 | -0.195 |
| 197203 | -0.141 |
| 197204 | 1.007 |
| 197205 | 0.140 |
| 197206 | -0.049 |
| 197207 | -0.553 |
| 197208 | -0.082 |
| 197209 | -0.920 |
| 197210 | 0.392 |
| 197211 | -0.380 |
| 197212 | 1.238 |
| 197301 | 1.232 |
| 197302 | 0.786 |
| 197303 | 0.537 |
| 197304 | -1.126 |
| 197305 | 0.073 |
| 197306 | 0.531 |
| 197307 | 0.270 |
| 197308 | 0.313 |
| 197309 | 0.114 |
| 197310 | 0.337 |
| 197311 | 0.002 |
| 197312 | -0.181 |
| 197401 | 0.232 |
| 197402 | -0.489 |
| 197403 | -0.746 |
| 197404 | 0.309 |
| 197405 | -0.507 |
| 197406 | -0.048 |
| 197407 | 0.390 |
| 197408 | -0.533 |
| 197409 | -0.136 |
| 197410 | -1.024 |
| 197411 | -0.435 |
| 197412 | 0.556 |
| 197501 | 1.595 |
| 197502 | 0.194 |
| 197503 | 0.151 |
| 197504 | 0.409 |
| 197505 | -0.614 |
| 197506 | -0.323 |
| 197507 | 0.345 |
| 197508 | 0.130 |
| 197509 | 1.278 |
| 197510 | 0.138 |
| 197511 | 0.619 |
| 197512 | 1.290 |
| 197601 | 0.034 |
| 197602 | 1.656 |
| 197603 | 0.587 |
| 197604 | 0.440 |
| 197605 | 0.060 |
| 197606 | 0.328 |
| 197607 | -0.325 |
| 197608 | 0.559 |
| 197609 | -0.743 |
| 197610 | -0.804 |
| 197611 | -0.087 |
| 197612 | -2.074 |
| 197701 | -3.767 |
| 197702 | -2.010 |
| 197703 | 0.344 |
| 197704 | 1.329 |
| 197705 | 0.104 |
| 197706 | -0.226 |
| 197707 | -0.492 |
| 197708 | -1.412 |
| 197709 | 0.586 |
| 197710 | -0.009 |
| 197711 | 0.605 |
| 197712 | -0.240 |
| 197801 | -0.347 |
| 197802 | -3.014 |
| 197803 | 0.502 |
| 197804 | -0.967 |
| 197805 | 0.059 |
| 197806 | 0.635 |
| 197807 | -0.604 |
| 197808 | -0.354 |
| 197809 | -0.099 |
| 197810 | 0.895 |
| 197811 | 2.470 |
| 197812 | -0.980 |
| 197901 | -2.233 |
| 197902 | -0.697 |
| 197903 | -0.814 |
| 197904 | -1.157 |
| 197905 | -0.250 |
| 197906 | 0.933 |
| 197907 | 0.039 |
| 197908 | -0.684 |
| 197909 | -0.046 |
| 197910 | -1.243 |
| 197911 | 0.475 |
| 197912 | 1.295 |
| 198001 | -2.066 |
| 198002 | -0.934 |
| 198003 | -1.433 |
| 198004 | -0.419 |
| 198005 | -1.155 |
| 198006 | 0.721 |
| 198007 | -0.622 |
| 198008 | -0.185 |
| 198009 | 0.313 |
| 198010 | -0.521 |
| 198011 | -1.361 |
| 198012 | -0.057 |
| 198101 | -0.116 |
| 198102 | -0.332 |
| 198103 | -1.645 |
| 198104 | 0.430 |
| 198105 | 0.180 |
| 198106 | -0.438 |
| 198107 | 0.561 |
| 198108 | -0.244 |
| 198109 | -1.040 |
| 198110 | -1.167 |
| 198111 | -0.188 |
| 198112 | -1.216 |
| 198201 | -0.883 |
| 198202 | 0.974 |
| 198203 | 1.074 |
| 198204 | 1.454 |
| 198205 | -0.209 |
| 198206 | -1.180 |
| 198207 | 0.005 |
| 198208 | 0.362 |
| 198209 | 0.558 |
| 198210 | -0.211 |
| 198211 | 0.661 |
| 198212 | 0.967 |
| 198301 | 1.359 |
| 198302 | -1.806 |
| 198303 | -0.567 |
| 198304 | -0.738 |
| 198305 | -0.441 |
| 198306 | 0.313 |
| 198307 | 0.131 |
| 198308 | 1.098 |
| 198309 | 0.167 |
| 198310 | 1.369 |
| 198311 | -0.688 |
| 198312 | 0.186 |
| 198401 | 0.905 |
| 198402 | -0.303 |
| 198403 | -2.386 |
| 198404 | -0.284 |
| 198405 | 0.479 |
| 198406 | 0.007 |
| 198407 | 0.019 |
| 198408 | 0.466 |
| 198409 | -0.413 |
| 198410 | -0.270 |
| 198411 | -0.966 |
| 198412 | 0.446 |
| 198501 | -2.806 |
| 198502 | -1.440 |
| 198503 | 0.551 |
| 198504 | 0.652 |
| 198505 | -0.432 |
| 198506 | -0.347 |
| 198507 | -0.390 |
| 198508 | -0.001 |
| 198509 | 0.114 |
| 198510 | 1.035 |
| 198511 | -1.218 |
| 198512 | -1.948 |
| 198601 | -0.568 |
| 198602 | -2.904 |
| 198603 | 1.931 |
| 198604 | 0.103 |
| 198605 | 0.367 |
| 198606 | 0.535 |
| 198607 | -0.008 |
| 198608 | -0.826 |
| 198609 | -0.023 |
| 198610 | 1.425 |
| 198611 | 0.926 |
| 198612 | 0.060 |
| 198701 | -1.148 |
| 198702 | -1.473 |
| 198703 | -1.746 |
| 198704 | 0.387 |
| 198705 | 0.325 |
| 198706 | -0.710 |
| 198707 | -0.466 |
| 198708 | -0.836 |
| 198709 | 0.287 |
| 198710 | -0.080 |
| 198711 | -0.536 |
| 198712 | -0.534 |
| 198801 | 0.265 |
| 198802 | -1.066 |
| 198803 | -0.197 |
| 198804 | -0.561 |
| 198805 | -0.846 |
| 198806 | 0.061 |
| 198807 | -0.143 |
| 198808 | 0.255 |
| 198809 | 1.039 |
| 198810 | 0.032 |
| 198811 | -0.035 |
| 198812 | 1.679 |
| 198901 | 3.106 |
| 198902 | 3.279 |
| 198903 | 1.530 |
| 198904 | -0.250 |
| 198905 | 0.889 |
| 198906 | 0.345 |
| 198907 | 0.866 |
| 198908 | 0.551 |
| 198909 | 0.703 |
| 198910 | 0.991 |
| 198911 | 0.034 |
| 198912 | -0.644 |
| 199001 | 1.001 |
| 199002 | 3.402 |
| 199003 | 2.990 |
| 199004 | 1.879 |
| 199005 | 0.943 |
| 199006 | 0.304 |
| 199007 | -0.296 |
| 199008 | -0.180 |
| 199009 | -0.210 |
| 199010 | 0.660 |
| 199011 | 0.521 |
| 199012 | 1.277 |
| 199101 | 0.723 |
| 199102 | -0.876 |
| 199103 | -0.527 |
| 199104 | 0.530 |
| 199105 | 0.486 |
| 199106 | -0.115 |
| 199107 | -0.188 |
| 199108 | 0.797 |
| 199109 | -0.112 |
| 199110 | -0.252 |
| 199111 | 0.285 |
| 199112 | 1.613 |
| 199201 | 0.550 |
| 199202 | 1.122 |
| 199203 | 0.984 |
| 199204 | -0.521 |
| 199205 | 1.341 |
| 199206 | -0.302 |
| 199207 | 0.191 |
| 199208 | 0.535 |
| 199209 | -0.640 |
| 199210 | -0.366 |
| 199211 | 0.717 |
| 199212 | 1.627 |
| 199301 | 3.495 |
| 199302 | 0.184 |
| 199303 | 0.764 |
| 199304 | -0.435 |
| 199305 | -1.607 |
| 199306 | -0.520 |
| 199307 | -0.511 |
| 199308 | -0.393 |
| 199309 | -0.361 |
| 199310 | -0.565 |
| 199311 | 1.002 |
| 199312 | -0.104 |
| 199401 | -0.288 |
| 199402 | -0.862 |
| 199403 | 1.881 |
| 199404 | 0.225 |
| 199405 | -0.115 |
| 199406 | 1.606 |
| 199407 | 0.351 |
| 199408 | 0.828 |
| 199409 | -0.084 |
| 199410 | 0.174 |
| 199411 | 1.779 |
| 199412 | 0.894 |
| 199501 | -0.154 |
| 199502 | 1.429 |
| 199503 | 0.393 |
| 199504 | -0.963 |
| 199505 | -0.891 |
| 199506 | -0.112 |
| 199507 | -0.217 |
| 199508 | 0.544 |
| 199509 | -0.549 |
| 199510 | 0.075 |
| 199511 | -0.723 |
| 199512 | -2.127 |
| 199601 | -1.200 |
| 199602 | 0.163 |
| 199603 | -1.483 |
| 199604 | -1.525 |
| 199605 | -0.226 |
| 199606 | 0.497 |
| 199607 | 0.715 |
| 199608 | 0.125 |
| 199609 | -1.140 |
| 199610 | 0.183 |
| 199611 | 0.136 |
| 199612 | -1.721 |
| 199701 | -0.457 |
| 199702 | 1.889 |
| 199703 | 1.091 |
| 199704 | 0.324 |
| 199705 | -0.961 |
| 199706 | -0.815 |
| 199707 | -0.431 |
| 199708 | 0.121 |
| 199709 | 0.195 |
| 199710 | -0.700 |
| 199711 | -0.661 |
| 199712 | -0.071 |
| 199801 | -2.081 |
| 199802 | -0.183 |
| 199803 | -0.254 |
| 199804 | -0.038 |
| 199805 | 0.429 |
| 199806 | -0.711 |
| 199807 | -0.212 |
| 199808 | 0.650 |
| 199809 | -1.050 |
| 199810 | 0.294 |
| 199811 | -1.449 |
| 199812 | 1.353 |
| 199901 | 0.110 |
| 199902 | 0.482 |
| 199903 | -1.492 |
| 199904 | 0.284 |
| 199905 | 0.226 |
| 199906 | 0.707 |
| 199907 | -0.002 |
| 199908 | -0.672 |
| 199909 | 0.059 |
| 199910 | -0.006 |
| 199911 | 0.611 |
| 199912 | 1.043 |
| 200001 | 1.270 |
| 200002 | 1.076 |
| 200003 | -0.451 |
| 200004 | -0.279 |
| 200005 | 0.969 |
| 200006 | 0.586 |
| 200007 | -0.649 |
| 200008 | 0.144 |
| 200009 | 0.395 |
| 200010 | 0.317 |
| 200011 | -1.581 |
| 200012 | -2.354 |
| 200101 | -0.959 |
| 200102 | -0.622 |
| 200103 | -1.687 |
| 200104 | 0.906 |
| 200105 | 0.452 |
| 200106 | -0.015 |
| 200107 | -0.031 |
| 200108 | 0.521 |
| 200109 | -0.707 |
| 200110 | 0.707 |
| 200111 | 0.819 |
| 200112 | -1.322 |
| 200201 | 1.381 |
| 200202 | 1.304 |
| 200203 | 0.902 |
| 200204 | 0.748 |
| 200205 | 0.401 |
| 200206 | 0.573 |
| 200207 | 0.328 |
| 200208 | -0.229 |
| 200209 | -0.043 |
| 200210 | -1.489 |
| 200211 | -1.425 |
| 200212 | -1.592 |
| 200301 | -0.472 |
| 200302 | 0.128 |
| 200303 | 0.933 |
| 200304 | -0.178 |
| 200305 | 1.017 |
| 200306 | -0.102 |
| 200307 | 0.075 |
| 200308 | -0.280 |
| 200309 | 0.467 |
| 200310 | -0.670 |
| 200311 | 0.642 |
| 200312 | 0.265 |
| 200401 | -1.686 |
| 200402 | -1.528 |
| 200403 | 0.318 |
| 200404 | -0.409 |
| 200405 | -0.094 |
| 200406 | -0.236 |
| 200407 | -0.201 |
| 200408 | -0.720 |
| 200409 | 0.855 |
| 200410 | -0.515 |
| 200411 | 0.678 |
| 200412 | 1.230 |
| 200501 | 0.356 |
| 200502 | -1.271 |
| 200503 | -1.348 |
| 200504 | -0.046 |
| 200505 | -0.763 |
| 200506 | -0.383 |
| 200507 | -0.030 |
| 200508 | 0.026 |
| 200509 | 0.802 |
| 200510 | 0.030 |
| 200511 | 0.228 |
| 200512 | -2.104 |
| 200601 | -0.170 |
| 200602 | -0.156 |
| 200603 | -1.604 |
| 200604 | 0.138 |
| 200605 | 0.156 |
| 200606 | 1.071 |
| 200607 | 0.103 |
| 200608 | -0.265 |
| 200609 | 0.606 |
| 200610 | -1.029 |
| 200611 | 0.521 |
| 200612 | 2.282 |
| 200701 | 2.034 |
| 200702 | -1.307 |
| 200703 | 1.182 |
| 200704 | 0.544 |
| 200705 | 0.894 |
| 200706 | -0.555 |
| 200707 | -0.397 |
| 200708 | -0.034 |
| 200709 | 0.179 |
| 200710 | 0.383 |
| 200711 | -0.519 |
| 200712 | 0.821 |
| 200801 | 0.819 |
| 200802 | 0.938 |
| 200803 | 0.586 |
| 200804 | -0.455 |
| 200805 | -1.205 |
| 200806 | -0.090 |
| 200807 | -0.480 |
| 200808 | -0.080 |
| 200809 | -0.327 |
| 200810 | 1.676 |
| 200811 | 0.092 |
| 200812 | 0.648 |
| 200901 | 0.800 |
| 200902 | -0.672 |
| 200903 | 0.121 |
| 200904 | 0.973 |
| 200905 | 1.194 |
| 200906 | -1.351 |
| 200907 | -1.356 |
| 200908 | -0.054 |
| 200909 | 0.875 |
| 200910 | -1.540 |
| 200911 | 0.459 |
| 200912 | -3.413 |
| 201001 | -2.587 |
| 201002 | -4.266 |
| 201003 | -0.432 |
| 201004 | -0.275 |
| 201005 | -0.919 |
| 201006 | -0.013 |
| 201007 | 0.435 |
| 201008 | -0.117 |
| 201009 | -0.865 |
| 201010 | -0.467 |
| 201011 | -0.376 |
| 201012 | -2.631 |
| 201101 | -1.683 |
| 201102 | 1.575 |
| 201103 | 1.424 |
| 201104 | 2.275 |
| 201105 | -0.035 |
| 201106 | -0.858 |
| 201107 | -0.472 |
| 201108 | -1.063 |
| 201109 | 0.665 |
| 201110 | 0.800 |
| 201111 | 1.459 |
| 201112 | 2.221 |
| 201201 | -0.220 |
| 201202 | -0.036 |
| 201203 | 1.037 |
| 201204 | -0.035 |
| 201205 | 0.168 |
| 201206 | -0.672 |
| 201207 | 0.168 |
| 201208 | 0.014 |
| 201209 | 0.772 |
| 201210 | -1.514 |
| 201211 | -0.111 |
| 201212 | -1.749 |
| 201301 | -0.610 |
| 201302 | -1.007 |
| 201303 | -3.185 |
| 201304 | 0.322 |
| 201305 | 0.494 |
| 201306 | 0.549 |
| 201307 | -0.011 |
| 201308 | 0.154 |
| 201309 | -0.461 |
| 201310 | 0.263 |
| 201311 | 2.029 |
| 201312 | 1.475 |
| 201401 | -0.969 |
| 201402 | 0.044 |
| 201403 | 1.206 |
| 201404 | 0.972 |
| 201405 | 0.464 |
| 201406 | -0.507 |
| 201407 | -0.489 |
| 201408 | -0.372 |
| 201409 | 0.102 |
| 201410 | -1.134 |
| 201411 | -0.530 |
| 201412 | 0.413 |
| 201501 | 1.092 |
| 201502 | 1.043 |
| 201503 | 1.837 |
| 201504 | 1.216 |
| 201505 | 0.763 |
| 201506 | 0.427 |
| 201507 | -1.108 |
| 201508 | -0.689 |
| 201509 | -0.165 |
| 201510 | -0.250 |
| 201511 | 1.945 |
