2013

8.1

2003

7.8

2017

6.4

2004

8.0

2014

6.4

1999

6.9

2011

7.4

2001

8.2

1995

7.2

2008

7.6

2013

7.1

2016

6.9

2013

7.4

2013

6.9

2007

7.5

1972

7.9

2000

6.9

1997

6.3

1999

7.4

2016

7.1