2008

7.3

2004

7.3

2011

6.5

2014

8.5

2006

6.1

2004

7.0

1997

4.5

2009

7.7

2012

7.2

2013

6.8

2010

7.5

2005

6.7

2003

7.8

2004

6.6

2018

7.1

2014

7.4

2006

5.9

1966

8.5

2001

6.2

1991

5.9