1963

6.4

1979

6.2

1978

5.9

1985

6.2

1966

1.0

1970

0.0

1991

6.3

1977

3.5

1980

6.3

1971

0.0

1969

0.0

1968

4.4

1973

2.0

1962

6.9

1960

0.0

1957

6.3

1959

6.8

1960

6.2

1971

3.3

1973

3.0

1974

6.1

1988

10.0

1976

3.8

1970

2.0