2016

4.7

2011

6.2

2008

5.7

2013

5.5

2014

4.2

1994

3.8

1974

5.9

1972

6.2

1998

5.5

2006

5.5

2008

4.0

2006

4.2

1991

0.0

2005

7.4

2012

3.7

1978

0.0

2008

4.5

2008

4.6

1972

5.5

1982

5.0