1983

0.0

1973

4.4

1986

4.2

1983

6.0

1978

6.1

2007

4.3

2001

5.1

2001

5.3

1988

5.5

1988

6.3

1968

3.7

2003

5.0

2009

4.3

2002

2.5

2002

5.9

2000

6.2

1972

10.0

2002

5.3

1991

3.5

1977

5.2