2005

7.5

2009

6.1

2005

6.3

2002

5.8

1992

6.1

1999

5.1

1943

6.5

1997

5.9

1997

4.5

2007

6.0

2008

6.7

1964

7.0

1995

7.7

2003

5.8

1953

6.2

2009

6.6

2009

6.2

2007

5.3

1979

7.5

1963

6.9