2005

5.2

2016

4.0

2013

6.0

2015

7.3

2004

4.5

2012

6.2

1997

3.0

1971

6.4

1992

5.5

2009

6.1

2004

6.1

2015

6.9

2016

9.0

1999

4.4

2014

4.0

2003

0.0