2010

6.8

2005

5.0

2018

6.8

2009

4.5

2001

6.7

1997

5.9

2003

0.0

2018

4.9

2007

6.1

2008

3.6

2011

5.3

2015

0.0

2010

6.6

1976

5.8

2016

7.1

2000

6.3

2002

7.5

2000

6.9

0.0

2018

1.0