1993

5.1

1992

4.9

1989

2.3

1991

3.2

1987

3.2

1993

1.8

1992

4.9

1988

2.4

1994

0.0

1990

2.7

1999

5.0

1994

3.2

1992

4.5

2003

6.2

1999

3.0