2005

6.2

2016

5.6

2010

5.2

2002

9.5

2014

8.4

2007

6.7

2011

7.3

2009

6.7

1996

6.5

2012

5.9

2013

6.3

2005

5.8

2018

6.5

2012

7.2

2006

5.3

2018

5.6

2012

5.5

2015

8.2

2001

6.0

1985

6.8