1992

4.7

1994

8.1

1987

4.7

1997

8.1

1986

5.8

1994

7.8

1994

3.2

1993

5.4

1992

4.1

1994

3.2

1988

4.8

1997

5.7

1993

4.2

2000

6.8

1989

5.6

1990

0.0

1989

5.0

1995

4.6

1990

6.8

1972

2.0