1982

0.0

1981

5.4

1978

4.8

1996

6.0

1983

6.5

1998

7.0

1981

0.0

1980

0.0

1991

5.3

1999

6.0

1999

10.0

1994

5.0

1976

0.0

1982

0.0

1986

0.0

2000

0.0

1985

7.3

1990

6.5

1990

6.2

1997

7.3