1997

6.6

1992

0.0

2004

7.9

1993

7.6

1996

6.8

2006

4.2

1994

5.0

2000

8.5

2005

7.5

1992

5.9

1984

7.5

1990

6.1

1996

7.8

2001

7.6

1985

7.5

2003

9.3

1998

4.8

1993

8.4