2000

5.3

2013

4.6

1985

6.8

2005

5.4

1987

6.6

2008

8.0

1997

6.7

1995

6.0

2007

7.0

2012

7.9

1995

3.5

2008

0.0

2012

6.7

1996

6.0

2001

6.0

1992

0.0

2010

4.5

2006

5.3

2012

0.0

2008

5.7

2017

6.9