1969 6.7

1969 7.0

1969 7.1

1968 8.0

1968 7.8

1967 8.0

1967 6.8

1967 7.9

1967 6.3

1966 7.4

1965 7.5

1965 6.9

1965 7.5

1964 8.4

1964 7.0

1964 7.7

1963 7.3

1963 8.4

1963 7.6

1962 7.4