1970

6.4

1991

3.2

1975

7.3

1992

8.6

1980

0.0

1966

6.3

1968

7.1

1984

3.0

1981

7.6

1979

4.7

1987

6.0

1994

5.4

1980

7.3

1990

4.7

1973

6.9

1982

7.5

1983

7.5

1974

6.6

1969

2.6

1995

2.8

1978

7.0

1982

7.5

1977

5.0