2002

7.7

2008

6.6

2004

7.4

2000

5.0

1997

6.5

1995

7.3

2002

7.3

1991

5.7

2007

5.2

2003

6.2

2001

6.9

2001

0.0

1997

7.6

1998

6.0

1993

8.4

1994

6.0