1975

4.8

1985

6.8

1986

4.8

1979

5.1

1971

8.1

1977

7.0

1991

3.5

1989

3.6

1990

3.3

1979

6.2

1968

6.7

1993

4.0

1989

3.0

1986

6.8

1971

7.0

1992

6.2

1976

6.0

1983

0.0

1978

5.0

1974

7.0

1976

6.2

1977

0.0