1971

5.3

1977

0.0

1987

6.9

1976

5.5

1982

3.0

1991

8.0

1964

4.3

1984

4.0

1954

5.4

1978

5.6

1995

0.0

1979

0.0

1975

6.0

1957

7.0

1999

7.2

1971

7.6