1979

6.5

1985

8.3

1977

5.5

1981

5.4

1983

5.5

1981

7.0

1971

5.3

1990

5.8

1978

6.6

1950

6.3

1993

1.0

1981

6.0

1984

5.9

1975

7.3

1997

5.6

1949

4.9

1979

6.7

1974

6.4

1985

5.6

1976

7.0

1978

0.0

1972

7.3

1979

6.1

1954

0.0

1948

6.3

1972

0.0

1979

6.7

1972

6.9

1953

0.0