Year     ExtAnom
    1979         3.7
    1980       -17.8
    1981       -15.1
    1982        11.4
    1983         0.3
    1984        -8.8
    1985        -7.4
    1986        -5.3
    1987         2.6
    1988         0.9
    1989        -2.8
    1990         1.2
    1991         0.5
    1992        -5.5
    1993        -3.0
    1994        17.7
    1995        15.3
    1996         7.0
    1997       -10.7
    1998         7.9
    1999         5.1
    2000         2.8
    2001        17.7
    2002        -8.6
    2003        11.2
    2004        11.4
    2005         3.7
    2006       -20.2
    2007        -4.6
    2008        28.6