2002

5.6

2011

0.0

2015

8.5

2014

8.0

1999

4.0

2006

0.0

2008

6.6

2004

6.0

2010

5.4

2017

6.8

1970

6.2

2009

0.0

2020

6.3

2006

7.0

2009

7.4