2012

8.4

2004

8.6

2011

8.1

2002

7.7

1995

7.6

1996

7.7

2006

7.9

2007

7.5

2010

7.8

2014

7.3

2016

6.2

2015

8.3

2019

6.9

2002

7.5

2016

7.1

2013

7.9

2005

8.5

2010

7.9

2007

8.5

1993

7.1