2009

8.5

2011

5.2

6.4

2014

6.8

2004

6.4

1940

7.1

2016

7.4

2012

6.2

1998

7.0

2015

6.1

2014

7.0

2015

5.1

2001

6.5

2017

6.0

1997

6.2

2013

6.9

2006

6.0

2011

6.3

2011

7.4

2018

8.4