2006

6.1

2008

7.7

7.8

2017

5.9

1990

6.6

2012

6.4

5.4

2008

8.7

2004

6.0

2008

6.3

2011

7.2

1992

6.0

2011

5.7

2009

5.3

2009

7.1

2013

7.6

1991

6.5

2007

5.7

2015

5.1