2012

5.8

2013

7.1

2001

5.3

2015

6.4

2010

5.8

2017

6.6

2014

6.8

2015

5.3

2003

6.7

2008

6.1

2010

7.0

2011

5.2

2005

7.8

1990

7.5

1997

6.2

1996

6.4

2007

6.5

2006

5.7

1992

7.3

2021

9.2