1971

7.3

1975

8.0

1969

6.1

1964

6.5

1965

6.7

1957

6.0

1959

6.1

1983

7.9

1948

6.6

1953

4.5

1977

8.2

1973

6.8

1965

5.6

1978

5.9

1953

5.0

1959

5.8

1983

7.2

1954

6.5

1956

7.5

1963

5.4

1953

6.1

1956

6.3

1972

4.0