1992

0.0

1989

4.4

2005

3.9

1990

4.3

1983

3.4

1989

2.5

2009

4.0

1975

3.9

1978

5.0

1987

3.5

1990

4.1

1991

3.0

2003

0.0

2001

3.8

1978

3.5

1991

8.0

1988

4.0

1993

4.0

1988

5.0

1986

4.6

1990

4.0

2000

7.0

2006

5.2

2006

4.5

1980

4.9

2013

5.9

1974

4.7

1985

4.2