Year Solar Irradiance Lean et al., 1995 1990 1985 1980 1367.36 1975 1367.08 1970 1367.20 1965 1367.00 1960 1367.12 1955 1367.10 1950 1367.10 1945 1366.84 1940 1366.62 1935 1366.38 1930 1366.24 1925 1366.08 1920 1365.92 1915 1365.82 1910 1365.74 1905 1365.72 1900 1365.62 1895 1365.64 1890 1365.66 1885 1365.66 1880 1365.76 1875 1365.84 1870 1366.00 1865 1366.02 1860 1366.12 1855 1366.04 1850 1366.14 1845 1366.10 1840 1366.14 1835 1365.94 1830 1365.68 1825 1365.34 1820 1365.02 1815 1364.84 1810 1364.88 1805 1365.08 1800 1365.44 1795 1365.72 1790 1365.96 1785 1366.06 1780 1366.18 1775 1366 1770 1365.96 1765 1365.84 1760 1365.94 1755 1365.83 1750 1365.9 1745 1365.7 1740 1365.7 1735 1365.27 1730 1365.15 1725 1365.02 1720 1364.84 1715 1364.58 1710 1364.42 1705 1364.30 1700 1364.20 1695 1364.20 1690 1364.20 1685 1364.20 1680 1364.20 1675 1364.20 1670 1364.20 1665 1364.20 1660 1364.20 1655 1364.30 1650 1364.54 1645 1364.76 1640 1364.90 1635 1365.13 1630 1365.25 1625 1365.43 1620 1365.88 1615 1366.18 1610 1605 1600