1986

7.7

1996

5.0

1994

3.8

1993

7.1

2000

4.6

1984

7.2

1992

5.8

1990

6.3

1989

0.0

1990

3.3

2007

4.5

2007

7.3

1989

7.9

1991

4.7

2001

2.0

1999

4.6

1991

5.0