1982

7.6

1966

7.3

1961

8.0

1957

7.8

2001

7.4

1979

6.9

1979

7.4

2001

6.9

1987

7.6

1943

8.2

1981

8.1

1975

8.0

2006

7.5

1995

7.0

1946

7.8

1940

8.3

1942

6.6

1997

7.2

2005

6.7

1977

7.1