1975 7.9

1975 8.1

1974 7.7

1974 6.6

1974 9.0

1974 6.3

1974 7.3

1974 6.7

1974 7.8

1974 7.1

1974 7.2

1974 8.2

1974 7.7

1974 7.1

1974 5.2

1973 7.4

1973 7.7

1973 6.8

1973 8.0

1973 7.3