1987

5.5

1998

4.0

1997

5.2

1988

6.1

1997

3.5

1995

7.9

1990

5.8

2003

6.9

1989

8.0

1988

0.0

1991

7.3

1989

5.3

1993

2.3

1993

6.0

1999

6.3

1994

5.5

1987

0.0

1995

4.9

1988

6.2