1995

7.2

2003

7.6

2003

6.8

2000

6.0

2003

0.0

1994

8.3

2005

6.6

1997

5.7

2004

6.4

1992

6.6

2002

7.0

1994

7.3

1995

6.2

2003

5.7

1996

5.6

1997

6.3

1998

6.8

1998

7.1

2006

4.8

1988

6.8