1978

4.3

1972

7.2

1975

4.9

1985

6.4

1994

6.6

1970

0.0

1979

6.8

1993

5.9

1971

5.8

1968

6.7

1996

7.6

1979

0.0

1972

6.4

1984

6.6

1991

6.6

1971

5.3

1967

6.1