2009

0.0

1994

6.7

1990

8.5

2005

5.0

1991

6.4

1991

6.9

1992

6.3

2002

6.0

1995

4.2

1992

5.9

1996

5.5

1993

7.0

2001

8.0

2000

0.0

1988

6.3

1990

7.9

2008

5.9

1992

6.7