1988

6.3

2004

5.4

1979

3.8

2013

0.0

2005

0.0

2009

6.7

2012

6.7

2010

0.0

2005

0.0

2016

10.0

2003

8.3

1983

8.5

2017

0.0

1999

0.0

2015

7.8

1995

6.5

2011

2.0

1977

8.0

2000

6.2

2003

5.6