Year	Percent
1996-01-01	8.897580000000000
1997-01-01	8.191280000000000
1998-01-01	20.291000000000000
1999-01-01	21.158800000000000
2000-01-01	26.323400000000000
2001-01-01	24.204500000000000
2002-01-01	41.302800000000000
2003-01-01	34.059800000000000
2004-01-01	30.371400000000000
2005-01-01	28.687900000000000
2006-01-01	34.413700000000000
2007-01-01	32.285400000000000
2008-01-01	-28.127700000000000
2009-01-01	-7.004460000000001