1989

9.2

2012

9.7

2001

6.0

2015

6.9

2006

6.4

1979

7.3

2011

9.5

2016

4.5

2013

6.2

2018

5.4

2007

7.5

2014

6.9

2012

5.8

2003

5.7

2001

9.9

2012

6.4

2016

6.1

2009

6.1

2015

6.3

2009

5.0