1991

4.0

1990

5.5

1998

4.8

1999

5.8

2009

5.7

2001

5.2

1990

7.4

1994

3.1

1992

6.7

1991

6.0

2002

5.1

1995

4.5

1996

6.5

1997

0.0

2000

3.0

1995

7.3

1996

5.4

1988

5.2

1998

7.0

1997

3.0

1994

0.0

1990

3.0

1996

7.4