1996

6.7

1982

6.9

2016

5.9

1964

7.0

2010

5.6

2006

5.2

2009

5.4

2010

6.0

2012

7.3

2011

7.1

2014

5.3

2004

7.7

1995

6.8

2012

6.3

2007

6.6

2008

4.6

2010

6.8

2016

6.4

2013

7.9

2012

6.0