1996

6.4

1997

7.3

2009

8.0

1998

8.2

2005

5.9

2001

7.2

2000

7.6

2003

4.9

1994

7.8

1995

7.3

2003

7.3

1990

7.4

2006

6.7

2001

4.6

2005

7.0

1993

7.5

1997

3.5

2001

7.0

2001

6.8

1999

4.5

2008

8.4

2001

7.8

1997

7.7

2002

6.8

2005

7.5

2002

7.2