2009

2.7

2004

3.5

2002

4.2

1995

1.0

2015

4.1

1975

0.0

1995

5.3

1971

4.5

1976

0.0

1974

3.8

1971

6.0

1990

3.5

1976

3.3

1979

6.0

2013

3.9

1977

3.4

1986

4.9

1981

3.7

1978

3.7

2007

5.0