1995

6.2

1982

7.6

1987

7.3

1982

5.1

1994

7.8

1981

5.5

1985

0.0

1976

0.0

1995

7.3

1979

6.7

2000

8.5

1998

3.3

1978

0.0

1994

6.8

1999

5.9