1961 -999.0 -4.7 -11.5 -17.5 -17.1 -17.6 -23.6 -19.2 -18.5 -14.3 -7.8 -5.0 1962 -4.7 -7.1 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 1963 -3.9 -6.7 -13.6 -21.8 -17.8 -17.1 -22.7 -17.1 -19.6 -20.0 -12.2 -3.1 1964 -3.2 -6.2 -12.0 -16.3 -17.8 -18.0 -18.2 -19.8 -24.2 -16.4 -8.6 -5.3 1965 -4.1 -5.7 -10.8 -14.4 -13.1 -16.8 -24.7 -23.4 -26.1 -18.0 -12.6 -4.4 1966 -5.4 -7.2 -11.2 -15.4 -15.9 -25.0 -20.2 -24.9 -21.2 -17.7 -7.7 -4.0 1967 -2.5 -6.6 -9.3 -15.6 -15.8 -14.9 -20.0 -21.0 -21.5 -15.9 -8.1 -2.5 1968 -3.9 -6.6 -9.5 -15.2 -19.8 -21.8 -25.8 -22.6 -22.4 -14.8 -8.4 -5.1 1969 -1.9 -5.8 -10.2 -11.9 -16.1 -15.4 -23.3 -27.1 -25.7 -14.7 -8.8 -3.8 1970 -3.3 -6.8 -8.3 -15.9 -20.5 -22.0 -22.8 -23.9 -23.9 -14.5 -7.0 -3.2 1971 -1.9 -3.9 -11.1 -15.8 -18.0 -22.7 -21.8 -25.5 -19.2 -14.8 -9.3 -3.7 1972 -3.6 -5.8 -11.4 -12.8 -16.9 -15.6 -25.9 -17.3 -18.1 -17.6 -8.7 -3.9 1973 -2.9 -6.6 -10.2 -12.8 -13.2 -16.2 -21.4 -26.0 -20.5 -15.5 -9.3 -3.9 1974 -4.1 -6.0 -10.0 -16.7 -12.2 -19.4 -19.1 -23.1 -21.0 -15.4 -10.5 -2.8 1975 -3.1 -5.9 -8.7 -15.6 -14.6 -19.8 -23.7 -23.7 -20.5 -16.0 -7.6 -4.3 1976 -4.3 -6.9 -10.1 -15.9 -19.8 -18.9 -24.0 -23.5 -23.5 -18.6 -9.0 -2.5 1977 -2.8 -5.7 -11.0 -15.8 -16.8 -18.8 -16.4 -17.7 -21.1 -17.6 -10.7 -4.0 1978 -4.1 -5.3 -11.1 -15.7 -18.0 -22.4 -15.6 -24.1 -17.2 -14.1 -8.6 -2.2 1979 -3.5 -5.8 -10.1 -10.1 -15.3 -22.4 -24.2 -25.5 -19.4 -13.6 -6.8 -3.3 1980 -2.2 -7.9 -8.6 -12.6 -13.1 -20.5 -15.4 -20.2 -19.0 -15.2 -6.5 -2.8 1981 -2.4 -3.9 -9.9 -14.6 -14.9 -19.0 -14.3 -17.1 -20.9 -18.1 -8.6 -3.6 1982 -3.2 -6.9 -11.5 -15.4 -14.9 -20.6 -20.8 -22.1 -20.9 -16.6 -7.3 -2.7 1983 -2.5 -5.4 -10.4 -11.7 -14.8 -17.4 -21.7 -21.5 -17.6 -14.1 -9.6 -4.2 1984 -2.0 -5.8 -10.0 -15.9 -14.9 -19.5 -22.0 -26.2 -18.5 -16.8 -9.6 -2.5 1985 -1.2 -4.9 -8.8 -12.2 -18.5 -15.4 -20.8 -22.1 -19.8 -15.8 -12.1 -4.1 1986 -2.1 -3.1 -9.2 -14.6 -16.1 -23.1 -21.8 -19.6 -19.4 -17.1 -8.3 -2.9 1987 -1.4 -5.4 -8.3 -14.3 -17.3 -17.7 -20.9 -22.7 -23.7 -17.3 -7.9 -3.0 1988 -1.7 -4.6 -8.6 -16.5 -16.6 -13.4 -20.5 -20.6 -18.5 -14.4 -9.9 -3.6 1989 -2.3 -5.0 -9.7 -14.4 -24.7 -20.0 -21.4 -20.6 -21.3 -14.0 -6.4 -2.6 1990 -2.3 -5.4 -9.6 -14.1 -15.6 -20.0 -12.7 -24.5 -23.0 -12.4 -7.4 -1.8 1991 -2.0 -3.4 -10.0 -15.1 -34.0 -16.8 -17.6 -20.0 -19.1 -16.2 -8.6 -0.4 1992 -1.7 -4.8 -8.7 -14.4 -14.2 -16.6 -19.6 -22.9 -22.3 -16.6 -10.0 -3.8 1993 -2.5 -6.1 -10.4 -16.0 -16.8 -19.2 -25.0 -20.6 -18.8 -12.4 -9.4 -3.1 1994 -2.7 -7.0 -9.7 -13.4 -16.5 -14.2 -17.1 -21.4 -19.8 -13.2 -7.8 -3.5 1995 -3.5 -5.0 -10.7 -12.9 -17.2 -20.6 -19.1 -21.5 -22.8 -12.9 -9.0 -3.7 1996 -3.8 -4.2 -11.4 -14.6 -21.2 -18.5 -14.5 -18.3 -13.5 -12.6 -8.1 -3.4 1997 -3.0 -5.5 -9.9 -11.4 -16.8 -16.0 -22.9 -20.7 -21.2 -17.8 -8.5 -3.8 1998 -2.5 -5.7 -8.7 -19.8 -14.4 -18.6 -20.2 -23.3 -20.8 -17.5 -8.9 -5.3 1999 -2.1 -6.1 -9.9 -16.5 -17.6 -14.0 -22.0 -19.4 -18.7 -17.4 -9.5 -6.2 2000 -4.5 -7.2 -13.7 -15.3 -21.1 -16.5 -21.0 -23.3 -19.0 -15.5 -7.8 -4.3 2001 -3.0 -5.4 -10.2 -15.2 -13.8 -17.3 -20.0 -23.6 -22.3 -16.6 -9.0 -3.9 2002 -3.0 -6.7 -10.1 -11.4 -12.2 -14.4 -15.6 -19.5 -18.9 -11.1 -10.6 -4.5 2003 -2.5 -5.0 -8.9 -13.2 -16.6 -17.0 -22.2 -18.9 -20.7 -16.2 -7.4 -2.4 2004 -1.7 -3.9 -10.0 -17.7 -19.6 -20.3 -26.1 -22.3 -22.0 -13.5 -8.6 -1.6 2005 -2.1 -4.6 -9.4 -14.2 -17.3 -17.0 -20.8 -20.2 -19.7 -16.2 -12.2 -4.0 2006 -2.9 -6.3 -10.5 -15.1 -15.4 -17.6 -27.7 -15.9 -20.8 -19.5 -8.4 -4.6 2007 -2.6 -6.6 -10.0 -15.4 -13.9 -15.1 -15.3 -18.8 -21.1 -14.1 -5.8 -3.1 2008 -4.0 -6.3 -9.0 -12.9 -19.6 -21.0 -19.8 -24.3 -19.0 -17.0 -9.2 -3.3 2009 -3.8 -6.7 -10.6 -18.1 -16.2 -13.5 -18.1 -24.3 -20.1 -16.1 -9.2 -4.7 2010 -1.6 -4.0 -9.4 -14.8 -19.9 -23.1 -24.7 -24.9 -21.9 -17.8 -8.6 -3.4 2011 -0.8 -6.1 -11.2 -11.8 -18.9 -15.1 -19.4 -17.6 -20.2 -16.9 -7.3 -6.4 2012 -4.3 -7.0 -12.5 -17.3 -17.1 -21.4 -23.7 -18.7 -19.4 -14.0 -5.9 -2.5 2013 -2.4 -5.9 -11.4 -16.5 -19.3 -19.1 -20.1 -20.0 -15.4 -15.2 -6.4 -3.2 2014 -3.0 -5.3 -10.0 -15.2 -16.5 -18.4 -22.4 -21.4 -18.9 -17.8 -9.1 -3.0 2015 -4.0 -6.6 -11.0 -14.8 -16.0 -18.3 -21.5 -22.2 -24.2 -12.3 -7.2 -3.5 2016 -4.1 -5.1 -9.7 -13.7 -14.2 -18.9 -22.5 -16.1 -21.1 -11.4 -7.1 -2.0 2017 -2.7 -4.7 -10.5 -15.6 -15.4 -22.1 -17.3 -23.2 -20.1 -12.8 -7.6 -2.4 2018 -4.2 -5.3 -11.8 -13.2 -16.6 -15.8 -20.8 -19.4 -20.5 -17.5 -8.5 -2.7 2019 -2.4 -4.0 -10.1 -14.8 -18.3 -21.0 -21.3 -22.5 -22.0 -11.4 -7.1 -1.7 2020 -2.1 -5.5 -9.2 -11.8 -14.2 -18.0 -21.9 -21.9 -19.6 -14.9 -7.9 -4.0 2021 -3.3 -7.5 -7.7 -15.6 -17.8 -20.1 -20.4 -20.8 -19.3 -17.1 -8.8 -4.6 2022 -3.8 -7.2 -10.8 -14.9 -16.5 -15.6 -22.3 -18.5 -22.5 -13.0 -7.6 -3.9 2023 -2.9 -6.2 -8.5 -13.3 -13.3 -16.6 -20.5 -18.4 -17.2 -14.9 -10.1 -2.9