1968

7.1

1959

7.5

1976

6.3

1973

0.0

1955

6.6

1967

6.8

1975

6.5

1974

7.9

1970

4.0

1970

5.0

1976

0.0

1978

4.8

1971

0.0

1970

0.0

1970

7.4

1969

6.4

1972

7.0

1954

7.6

1970

4.5

1975

7.0

1968

6.8