2017

6.1

2004

6.9

2004

5.7

2006

7.8

1993

6.2

2007

4.9

2004

6.6

2009

7.1

1991

5.9

2002

4.5

1995

7.5

2006

6.6

2009

7.2

2015

7.0

2001

6.7

2008

6.8

2015

6.1

2014

5.6

2006

6.6

2015

6.9