1983    -999    -999    -999    -999    -999    -999   -40.4   -38.4   -34.4   -38.5   -34.2   -28.7
1984   -25.5   -30.0   -29.1   -37.9   -32.7   -39.1   -39.5   -34.7   -37.8   -34.3   -34.5   -28.8
1985   -28.2   -30.5   -31.4   -33.1   -41.0    -999    -999    -999    -999    -999    -999    -999
1986    -999    -999    -999   -35.2   -37.2   -35.3   -38.2   -35.8   -36.9   -34.8   -32.0   -28.9
1987   -26.2   -27.2   -32.3   -34.7   -36.9   -33.0   -35.3   -38.3   -35.3   -33.3   -32.5   -30.2
1988   -29.6   -31.1   -34.1   -33.2   -37.7   -37.5   -35.7   -40.0   -36.0   -35.1   -34.1   -29.9
1989   -32.0   -30.7   -34.9   -32.8   -37.0   -39.7   -35.2   -35.7   -34.0   -33.4   -36.6   -28.6
1990   -28.3   -30.5   -35.2   -36.3   -35.7   -37.2   -32.8   -38.0   -37.1   -37.9   -31.2   -29.6
1991   -28.8   -28.7   -33.5    -999    -999    -999    -999    -999    -999    -999    -999    -999