2014

6.2

2004

8.0

2011

7.0

2008

8.5

2001

6.7

2007

6.7

2009

6.7

2004

5.7

2016

5.9

2001

6.8

2015

6.5

1967

6.6

2012

5.8

1985

8.3

2002

6.3

2010

6.4

2011

6.5

2016

5.7

1971

7.4

2015

7.1