2011

6.2

2004

6.0

2013

5.6

1995

7.2

2016

6.6

2010

5.5

2006

6.1

2001

5.4

1998

6.6

2003

6.1

2000

5.2

2006

5.5

2011

6.2

1989

6.3

2012

5.1

2009

6.0

2010

5.7

2015

6.8

2011

5.7

2012

4.5