2010

7.0

2009

5.5

2003

5.3

2012

6.4

2008

5.2

2006

6.2

2016

5.6

1997

3.2

1999

8.0

2010

6.1

2011

6.2

2008

7.1

1990

6.1

2011

6.6

1995

5.9

1997

6.1

2012

6.9

2015

5.9

2013

7.3

2002

6.0