2012

6.7

2017

3.8

2009

5.6

2001

7.0

2006

5.5

2011

6.3

2008

5.5

1983

5.5

2007

6.8

2004

6.0

1996

6.8

2006

6.9

1957

7.2

2017

6.8

2009

7.1

1989

6.3

2010

6.1

2009

6.7

2010

6.3

2014

5.3