2007

0.0

1980

4.8

1988

5.4

1986

4.0

1993

5.5

2013

4.9

2013

4.3

2012

6.1

2012

5.8

1976

5.0

2014

6.3

2001

4.4

1968

5.1

1969

5.5

1991

4.5

1973

3.7

1975

5.8

1982

4.9

1970

5.5

1970

5.0