1970

0.0

1984

6.2

1986

6.8

1981

4.7

1967

6.0

2000

7.4

1950

6.4

1960

0.0

1984

6.6

1952

2.5

1960

8.2

1988

5.5

1975

7.5

1971

7.1

1989

0.0

1969

5.2

1994

7.6

1971

5.3

1978

6.4

1972

5.1

1982

6.2

1985

7.8

1973

7.5

1977

6.2

1965

6.3

1975

6.4

1980

4.8

1972

6.9

1959

5.0

1976

3.6

1973

5.0

1974

5.4

1958

5.4

1969

6.6

1973

7.1

1951

5.6

1977

0.0