2014

5.3

2007

8.0

2006

7.0

1999

6.9

2004

7.2

2009

7.4

2015

7.9

2009

7.3

2016

7.5

1994

8.5

2012

7.4

2010

8.4

1989

7.2

2017

7.2

2010

8.2

1987

7.3

2012

6.6

2013

8.0

2011

7.0

2008

7.3