1981

10.0

1977

6.7

1994

3.0

2003

0.0

1982

7.0

1990

2.5

1976

5.6

1985

6.9

1988

9.0

1995

4.0

1988

0.0

1978

7.5

1985

5.1

1992

0.0

1977

6.5

2000

7.1