1975

5.8

1981

6.0

1984

9.3

1973

7.0

1982

0.0

1986

0.0

1968

5.9

1974

8.3

1977

5.5

1976

0.0

1970

0.0

1976

6.4

1981

5.8

1959

6.7

1952

5.0

1973

6.2

1983

0.0