1964

7.6

2000

7.9

1959

5.2

1971

7.5

1944

6.0

1992

7.7

2001

7.5

1964

7.3

1940

7.4

1953

7.3

1930

6.1

1944

7.0

1957

7.2

1968

5.8

1952

8.1

1941

5.2

1941

4.0

1959

5.5

2006

6.7

1980

6.4