2006

6.5

1953

7.2

1994

5.9

1989

7.1

2009

6.8

1980

7.3

2007

7.2

2005

5.9

2008

6.7

1992

6.0

2003

6.4

1995

6.3

2001

5.2

1979

6.8

1930

4.1

2017

6.8

1999

6.8

2005

4.2

1985

6.2

1995

5.6