1985

7.1

1931

7.5

1943

6.2

1971

5.5

1964

6.1

1970

5.8

1973

3.1

1957

5.5

1966

4.3

1940

6.2

1972

4.7

1961

5.7

2002

7.2

2005

5.8

1955

6.5

1961

6.1

1971

2.7

1953

4.1

1936

6.0

1945

5.5