2007

7.7

2004

7.3

2014

7.6

2001

8.1

2005

8.3

2006

7.5

1966

8.0

2015

8.3

2017

7.6

2015

7.6

1990

8.0

2009

7.4

2003

8.2

2005

7.8

1990

7.1

2010

7.9

2011

6.8

2014

7.4

2000

7.9

2009

8.0