2002

6.5

2014

7.0

2014

6.5

2016

6.6

1988

6.4

1974

6.4

1991

6.2

2004

6.7

2013

6.1

2014

7.3

1995

7.2

2006

6.5

2009

6.0

2015

6.8

2003

6.3

2010

5.9

2011

6.2

2017

6.7

2012

6.9

2013

5.9