1972

2.5

1981

5.5

1986

5.3

1981

3.1

1978

4.5

1980

0.8

1988

0.0

1973

5.9

1978

3.2

1983

0.0

1992

0.0

1975

4.0

1980

1.0

1980

5.0

1972

5.1

1977

6.0

1979

5.5

1975

3.7

1978

5.8

1976

3.0

1977

2.0

1959

5.7

1977

2.0

1979

1.0