1932

7.3

2001

7.2

2002

6.2

1992

6.3

2005

6.6

2007

6.1

2007

5.5

2010

3.5

2005

7.1

1997

7.5

2008

6.6

1975

6.0

1983

6.4

1943

7.7

2010

5.5

1994

6.4

2007

6.0

2021

6.8

2001

6.8

2000

6.5