2001

7.1

2005

7.2

1946

7.5

1967

7.3

1954

7.9

1962

7.9

2001

6.9

1986

8.0

1997

7.4

1995

7.7

2004

6.3

1979

7.7

1979

6.2

1923

7.5

1977

7.7

1994

6.8

1993

7.4

2000

7.0

2006

7.9