1996

6.4

1984

7.6

1986

4.6

1973

5.2

1976

3.0

1967

2.3

1971

8.0

1981

5.5

1969

5.4

1975

3.3

1979

1.0

1965

7.8

1972

5.6

1987

0.0

1969

6.0

1968

3.9

1972

6.0

1984

7.5

1980

4.0

1974

3.5

1969

6.0

1978

0.0

1974

7.5

1975

0.0

2004

6.9

1967

4.1