1961

5.7

1960

3.7

1953

5.5

1955

5.8

1965

7.6

1953

5.8

1957

5.2

1955

3.3

1957

6.8

1955

4.5

1959

5.6

1957

7.6

1958

6.5

1956

3.7

1983

6.7

1962

6.3

1960

6.2

1957

6.0

1958

4.3