1987

7.7

2013

5.9

2007

4.0

2001

9.0

2016

7.3

2008

3.7

2005

3.3

1995

7.0

2015

6.2

2016

5.7

1985

7.7

2014

0.0

0.0

2007

4.6

2014

5.5

1997

8.3

2005

8.3

1996

6.9

1994

5.4

1987

6.5