1993

5.5

2015

8.4

2003

5.8

2001

6.9

2014

4.5

2014

8.4

2004

5.7

2005

6.9

2008

7.0

2009

5.3

2010

7.8

2012

9.4

2008

6.2

2016

6.4

2011

6.7

2015

7.1

6.0

2002

5.2

2007

7.3

1996

5.4