1986

6.5

1977

5.9

1978

6.1

1972

7.0

1953

7.3

1979

4.5

1981

0.0

1959

4.7

1968

5.8

1962

6.1

1960

6.1

1960

6.4

1964

6.0

1976

7.8

1979

7.3

1982

6.9

1956

7.2

1980

6.5

1958

6.0