2014

5.9

2016

7.0

2003

5.8

2007

5.2

2003

5.7

2009

8.5

2009

5.3

2013

4.0

1988

6.2

2017

5.9

1996

6.5

2001

5.2

1993

5.5

5.6

1995

6.9

2012

9.7

2013

6.2

1980

6.6

2013

6.6