2013

7.0

2009

8.0

2013

6.8

2001

7.9

2015

6.9

2005

5.7

1973

7.3

2012

8.0

2009

5.9

1996

7.1

1992

7.9

2011

6.7

2014

6.6

1984

7.5

2017

6.1

2000

5.8

2010

5.6

1999

8.0

2008

6.7

2012

7.3