1988

0.0

1982

6.0

1975

6.7

1994

2.0

1995

3.5

1972

5.5

1977

0.0

2001

6.0

1987

0.0

1977

0.0

1978

4.4

2011

7.0

1977

7.3

1950

0.0

1980

4.9

1982

4.6

1986

5.8

1981

4.8

1983

4.6

1990

5.4