1968

7.1

1984

7.6

1963

5.5

1964

6.0

1972

3.2

1967

6.9

1955

6.6

1979

6.8

1973

7.0

1958

5.4

1971

5.5

1970

7.8

1970

6.4

1976

7.5

1963

5.7

1982

0.0

1981

1.0