2006

7.0

2001

7.9

2004

8.0

2005

7.8

2009

7.7

2006

7.4

1993

4.0

2006

6.3

2007

6.1

1983

7.5

1997

5.9

1988

8.1

2011

6.7

1998

6.0

2017

8.0

1950

7.7

2018

7.7

2008

7.6

2013

6.9

2009

4.8