1966

7.3

1981

8.2

1991

6.6

1975

0.0

1969

5.4

1959

5.9

1971

6.0

1985

2.5

1967

0.0

1961

4.6

1981

7.9

1965

6.4

1983

0.0

1972

6.1

1962

6.7

1986

0.0

1978

7.4

1976

7.5