1946

7.6

1966

8.0

2011

5.6

1929

7.5

1968

6.7

1963

6.1

1949

8.0

1946

7.8

1977

5.9

1965

6.3

2001

5.2

1960

7.3

1942

6.9

1994

7.3

1991

6.7

2008

4.5

1956

7.5

2000

7.3

1953

7.6