1955

6.6

1959

6.2

1982

7.6

1956

4.1

1988

5.6

1953

6.1

1966

5.7

1955

6.6

1953

4.4

1953

6.9

1953

6.8

1980

6.1

1963

5.3

1955

6.7

1964

7.6

1952

6.4

1963

5.4

1953

6.2

1964

6.1

1960

6.4

1958

6.1

1959

4.9

1962

7.0

1957

8.8

1962

7.1

1957

6.3

1966

6.1

1960

6.2