2017

7.4

2014

7.1

2004

6.5

2008

8.7

2016

7.6

2020

6.1

2005

7.3

1995

5.6

1998

6.8

2011

5.7

1996

5.9

2001

6.8

2010

7.2

2007

6.9

2002

9.5

2013

6.7

2011

7.5

2016

7.3

2018

6.0

2007

6.7