1981

6.5

1978

7.2

1979

4.9

1995

8.1

1979

6.8

1984

5.0

1985

6.8

1979

6.7

1986

5.1

1982

7.4

1984

6.0

1979

1.3

1984

6.7

1987

5.2

1998

0.0

1988

0.0