2006

6.6

1987

7.1

1988

6.4

2003

6.3

1986

6.7

1980

6.6

2009

4.8

1984

6.8

2007

4.5

2012

0.0

2015

3.9

2008

4.3

2009

4.4

2007

5.6

1966

6.7

2008

5.2

2005

5.7

2014

7.6

2007

4.9

2004

5.6