1994

6.2

1991

4.9

1993

6.0

1982

7.6

1989

6.9

1996

8.0

1991

6.9

1993

10.0

2001

5.5

1991

5.3

1990

7.4

1995

6.9

1980

7.5

1990

5.5

1987

5.9

1983

4.4

1984

7.2

1984

7.0

1985

7.1

1999

5.1

1991

5.9