1998

6.3

1983

6.6

1971

3.3

1980

2.0

1981

5.5

1982

7.3

1995

7.3

1973

7.0

1996

5.5

1984

7.4

1985

3.5

1981

7.0

1988

0.0

1989

5.0

1993

7.9

1990

5.6

1982

5.3

1985

7.2

2001

4.7

1994

7.2

1985

5.8