1980    -999    -999    -999    -999      81      77      77      78      71      82      70      72
1981      70      72      87      87      85      83      81      77      87      81      79      85
1982      74      78      80      84      83      89      76      72      73      73      75      81
1983      80      75      80      83      73      84      83      81      73      77      79      74
1984      71      80      82      81      85      85      84      75      76      84      78      78
1985      75      77      80      80      82      83      80      74      79      82      82      72
1986      70      70      76      85      90      81      84      82      82      84      83      79
1987      66      78      78      76      78      79      86      82      79      77      74      77
1988      84      75      72      88      72      74      80      85      72      77      73      76
1989      78      68      81      83      85      76      76      84      81      80      80      77
1990      80      64    -999    -999    -999    -999    -999    -999    -999    -999    -999    -999