2006

6.3

1956

6.2

1985

6.5

1970

6.0

1977

6.7

1978

7.4

2012

5.5

1947

7.0

1920

7.9

1942

5.8

1968

7.5

2000

6.3

2005

5.4

1945

7.6

1965

7.4

1941

7.0

1966

6.3

1928

8.0

1977

7.6

1985

6.5