2013

6.5

2013

6.9

2003

5.8

2007

6.0

1969

6.4

2011

7.0

1991

5.3

2016

4.7

2014

5.1

1999

8.0

2001

6.2

2008

7.7

2015

5.1

2009

4.9

2010

5.9

2009

6.3

2011

6.2

2015

7.6

2013

6.7

2004

6.0