1974 6.7

1974 8.1

1974 7.2

1973 6.7

1973 6.8

1973 7.8

1973 6.4

1972 7.7

1972 7.2

1972 6.8

1972 7.4

1971 7.2

1971 5.0

1971 6.5

1971 7.3

1971 7.6

1971 7.6

1971 7.7

1971 7.4

1970 7.9