1969

0.0

1981

4.5

1980

5.0

2008

6.8

1973

0.0

1977

0.0

1999

7.0

1978

6.8

1998

5.2

1979

6.6

1971

0.0

1993

7.5

1982

0.0

1987

0.0

1994

4.0

1982

8.3