2016

7.7

1997

6.1

2007

6.5

2012

7.7

2001

8.9

2011

5.9

2006

7.8

2010

6.3

2009

7.5

1982

6.6

2016

6.9

1947

6.7

2009

6.7

1964

7.0

2014

7.6

2008

6.9

2015

6.5

1999

8.2

1998

4.8

2004

5.9