1998

7.3

2016

6.5

2013

6.7

2006

5.5

2002

6.2

2006

6.3

2008

5.0

2021

6.8

1995

7.7

2005

5.9

2006

7.6

2010

4.6

1985

8.3

2007

6.5

2009

6.6

2003

5.8

2009

3.8

2010

5.5

2013

5.8

2008

4.6