2007

6.8

1988

0.0

2001

4.3

1991

0.0

1992

6.4

1992

5.5

1991

5.7

1996

7.5

1993

5.6

2006

4.8

1992

5.0

2011

8.1

2002

6.0

1994

5.1

1997

6.0

1998

4.8