2008

5.0

1998

7.3

2006

6.3

2006

5.5

2013

6.7

2006

7.6

1997

4.0

2007

6.6

1992

7.0

2008

5.9

1995

7.7

2010

4.6

2017

6.8

1985

8.3

2009

3.8

2009

6.6

2016

6.5

2020

5.0

1978

6.0

2008

4.6