2010

6.8

2005

4.8

2018

6.8

2009

5.3

2001

6.7

1997

5.9

2003

0.0

2018

4.9

2007

6.1

2008

3.6

2011

5.4

2015

0.0

2010

6.6

2016

6.9

2000

6.3

2002

7.5

2000

6.9

0.0

2018

1.0