2002

4.9

1990

4.9

2006

6.6

1993

6.4

1994

7.8

2000

6.2

1991

5.7

1992

6.2

1992

6.7

2003

6.6

1991

5.0

1995

6.0

1989

8.3

1985

7.6

1993

8.1

1991

6.0

1988

8.3

1993

4.2