1976 7.3

1976 7.2

1976 6.6

1976 8.2

1976 6.5

1975 8.0

1975 6.4

1975 6.9

1974 7.7

1974 7.1

1974 9.0

1974 7.7

1974 8.1

1973 7.0

1973 8.1

1973 7.3

1973 6.9

1973 8.2

1973 7.3

1973 6.8