1961

7.5

1986

7.7

1967

7.6

1997

5.8

2002

6.5

2003

6.3

1989

7.2

1953

5.4

2006

7.0

1945

6.0

2004

7.3

1992

6.6

1999

6.8

2022

9.0

1977

7.2

1999

6.7

2014

4.3

1998

6.2

1998

7.5

2008

6.8