1978

4.0

1978

7.2

1982

6.3

1984

3.8

1988

0.0

1999

5.0

1994

6.9

1988

4.5

1987

5.6

1977

8.2

1980

8.0

1981

6.6

1984

7.1

1971

7.5

1977

9.5