1986

6.4

1997

6.0

1984

4.2

1967

8.0

1980

7.6

1991

6.2

1987

0.0

1965

7.5

1982

1.0

1975

4.5

1970

0.0

1972

7.3

1969

6.0

1972

5.0

1991

2.4

1967

6.0