2007

4.3

2003

5.8

2002

5.1

2001

5.4

2011

5.5

2014

7.9

2017

5.6

2013

6.0

2005

4.6

2009

5.9

2002

5.0

2013

5.2

2003

5.0

2001

3.6

2005

4.4

2011

5.5