1964

0.0

1976

6.5

1988

5.0

1982

5.7

1969

6.0

1989

7.0

1980

6.1

1973

10.0

1994

5.6

1971

5.0

1988

5.8

1971

6.3

1989

3.1

1979

7.4

1971

6.0

1977

5.0

1987

7.0

1960

6.0

1955

0.0

1987

5.0

1989

0.0

1932

0.0

1960

0.0

1969

0.0

1966

8.0