1979

7.2

1946

7.6

1995

7.9

2005

5.5

1987

5.9

2001

7.8

1983

5.8

1999

7.0

1945

7.4

2007

6.3

1967

6.4

1947

7.3

1948

7.9

1996

7.4

1973

7.4

1992

7.4

1991

6.1

1993

6.3

1997

6.9

2002

5.4