2006

5.2

2001

5.1

1997

6.6

1951

7.2

2010

6.6

2008

6.4

2003

6.9

2009

7.1

1996

6.7

2008

6.3

2006

5.1

1999

6.3

2007

5.9

1996

7.2

2001

5.7

1994

6.8

2005

6.5

1998

7.2

2005

6.7

2003

5.0