2010

7.0

2011

7.2

2008

6.7

1988

7.1

2007

4.7

2005

6.5

2009

8.0

1951

7.2

2008

6.3

1982

7.9

2008

6.7

1998

6.0

2017

7.3

2009

5.6

2011

5.9

1998

6.2

2006

6.5

2002

7.6

2003

7.5

2006

5.7