1996

7.5

1975

7.2

1994

5.9

1974

4.0

1994

7.8

1981

0.0

1970

6.3

1990

6.1

1973

7.0

1973

6.4

1985

3.9

1989

8.3

1982

6.3

1979

9.5

2000

4.5

1974

4.5

1974

6.7

1998

6.8