2005

7.6

2010

6.9

2013

6.5

2013

5.8

1992

7.7

2006

7.0

2009

0.0

1944

3.7

1985

7.4

2009

8.0

2005

5.5

2002

6.8

1983

6.4

2006

6.5

1961

7.2

1987

7.0

1927

8.0

1997

8.3

2005

5.5

2003

7.0