1979

7.2

1946

7.6

1968

7.2

1995

7.9

1973

7.5

2005

5.5

1989

6.3

1987

5.9

2001

7.8

1983

5.8

1999

7.0

1945

7.4

2007

6.3

1967

6.4

1996

6.7

1947

7.3

1948

7.9

1996

7.4

1973

7.4

1992

7.4