1979

7.8

1974

4.9

1990

4.8

2013

5.3

1984

6.5

2008

5.3

2000

4.7

2000

6.4

2001

5.8

2006

5.5

2004

6.7

2003

6.0

2013

4.8

2004

7.5

1975

7.8

2005

3.0

2009

2.0

2012

0.0

2008

0.0

1987

6.8