2009

7.5

1983

6.8

2011

7.6

2010

7.7

2007

8.6

2013

8.2

2016

7.8

2016

8.0

2005

7.6

2016

8.6

1996

6.8

2003

7.4

2015

8.3

2013

7.7

2014

8.1

2005

8.3

2014

7.3

2008

8.9

2017

8.1

2005

8.1