2004

6.9

1997

8.1

1986

0.0

1994

7.2

1996

5.5

1997

6.1

1993

5.5

1993

4.7

1995

7.3

1992

5.8

1993

6.2

1992

6.6

1989

8.3

1998

7.1

1993

8.4