1938

6.9

2015

7.6

2012

7.2

2016

7.0

2017

7.8

2009

7.1

2002

7.5

1992

7.7

2011

7.4

2006

6.3

2014

7.2

2014

7.6

2012

7.3

2016

6.6

2011

5.5

2005

6.4

2013

7.8

2016

7.3

2017

7.6

2014

6.2