1984

6.7

1979

6.1

2000

4.4

1989

5.9

1987

6.5

1980

5.3

2002

5.3

1980

3.7

1991

0.0

1984

7.6

1982

5.4

1976

7.4

1976

7.8

1994

7.3

1983

7.5

1990

5.9

1999

8.3

1993

0.0

1997

5.9