1990

5.7

1989

8.2

1981

6.5

1978

4.1

1976

4.7

1984

6.6

1980

8.5

1972

0.0

1977

5.9

1971

6.0

1979

6.7

1988

6.5

1973

6.3

1970

6.0

1987

7.4

1962

6.7

1975

7.7

1988

0.0

1987

4.3

1990

7.3