1977

4.1

1978

7.7

1974

8.0

1966

7.0

1970

7.5

1987

6.0

1995

6.5

1989

6.3

1991

5.5

1992

7.1

1993

5.5

1970

5.3

1969

6.8

1969

7.2

1958

6.9

1960

6.6

1963

0.0

1979

6.7

1981

6.1

1977

5.8

1968

10.0

1976

6.0

1975

7.6

1971

6.8

1971

0.0

1971

6.2