1982

4.0

1974

6.9

1987

4.9

1997

4.8

1995

5.6

2000

5.0

1992

5.3

1984

8.0

1983

5.0

2005

6.8

1989

5.1

1984

6.7

1983

6.0

2001

6.8

1985

3.8

1986

6.0

1975

0.0

1993

7.0

1987

0.0