1980 -999 -999 -999 -5.5 -5.8 -14.3 -7.9 -10.4 -12.8 -9.0 -7.1 -2.4 1981 -1.9 -4.7 -5.9 -10.3 -12.8 -14.2 -14.3 -21.3 -16.1 -10.2 -7.2 -1.8 1982 1.3 -3.2 -9.3 -18.7 -15.0 -13.0 -14.1 -13.8 -14.4 -12.2 -5.4 -0.1 1983 -1.8 -4.8 -6.5 -7.7 -7.6 -15.7 -16.2 -19.3 -12.6 -12.6 -7.4 -1.7 1984 -0.6 -3.5 -4.6 -9.6 -11.5 -10.1 -23.5 -21.0 -18.8 -10.3 -5.6 0.3 1985 0.0 -5.0 -7.7 -9.3 -10.1 -19.2 -21.7 -17.8 -16.6 -13.0 -5.6 -2.3 1986 -1.2 -2.8 -7.9 -11.7 -10.6 -14.6 -17.1 -19.1 -21.6 -12.6 -7.1 -2.6 1987 0.3 -3.7 -12.1 -11.6 -10.3 -11.6 -11.8 -13.6 -14.3 -11.8 -8.3 -0.4 1988 -1.4 -3.8 -8.7 -6.8 -10.6 -11.0 -11.5 -10.5 -12.8 -10.4 -5.3 -1.7 1989 -0.2 -2.6 -5.9 -6.2 -16.8 -15.8 -16.9 -17.7 -18.6 -10.6 -5.8 -1.1 1990 0.1 0.1 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999