2007

0.0

1980

4.8

1978

5.0

1998

8.0

1987

4.3

1988

5.4

1986

4.0

1993

5.5

2013

4.9

2011

3.1

2013

4.3

2012

6.1

2012

5.8

1976

5.0

1972

2.4

2006

1.0

1993

4.0

2014

6.3

1972

3.2

1974

4.1