2014

6.9

2000

6.8

2015

6.1

2012

7.0

2005

7.5

2016

7.0

2006

4.0

2009

7.7

2002

7.8

2003

0.0

2017

6.9

2011

6.4

2016

6.9

1999

4.7

2005

6.0