1935

0.0

1966

6.3

1939

7.6

1966

8.5

1959

7.8

1963

6.9

1964

6.6

1965

6.3

1990

6.5

1976

6.0

1953

6.6

1943

0.0

1950

5.0

1938

4.0

1950

0.0

2001

6.8

1967

5.6

1962

7.0

1973

7.3

2005

7.0