1996

4.6

1976

6.0

1999

7.9

1993

5.8

1977

0.0

1987

6.3

1975

6.4

1995

7.3

1995

5.3

1990

5.2

1996

4.8

1989

8.0

1976

1.0

1998

3.2

1982

4.0

1980

4.6

1976

5.0

1974

7.2