1990

7.3

1989

6.1

1992

6.2

1991

5.6

1994

4.4

1987

4.0

1995

5.1

1988

7.0

1996

5.3

2002

5.2

1999

6.7

1991

5.1

1993

7.9

1996

4.6

1991

7.1

1993

4.6

1990

5.0