1983    -999    -999    -999    -999    -999    -999   -72.2   -75.5   -74.3   -56.9   -43.1   -45.6
1984   -45.2   -43.9   -47.4   -51.8   -58.9   -62.1   -69.1   -72.0   -70.9   -61.6   -44.7   -45.1
1985   -43.0   -44.2   -46.4   -52.3   -57.6    -999    -999    -999    -999    -999    -999    -999
1986    -999    -999    -999   -54.2   -58.7   -64.4   -70.7   -70.7   -67.1   -63.2   -41.9   -42.8
1987   -43.8   -44.1   -46.5   -53.1   -60.2   -65.2   -74.3   -73.7   -75.9   -68.2   -62.1   -42.4
1988   -42.3   -43.0   -46.6   -52.8   -61.2   -67.7   -71.2   -70.1   -64.8   -47.6   -38.3   -40.2
1989   -40.8   -43.2   -46.4   -51.3   -57.6   -65.5   -71.2   -71.9   -70.8   -59.4   -50.7   -42.5
1990   -41.9   -42.5   -46.6   -52.9   -60.7   -63.4   -73.1   -75.2   -66.0   -67.4   -53.5   -43.3
1991   -41.4   -44.7   -45.1    -999    -999    -999    -999    -999    -999    -999    -999    -999