Year	Percent
1998-01-01	13.720800000000000
1999-01-01	5.719860000000000
2000-01-01	31.700000000000000
2001-01-01	17.000000000000000
2002-01-01	8.664520000000000
2003-01-01	11.177999999999999
2004-01-01	6.235860000000000
2005-01-01	14.662200000000000
2006-01-01	7.317610000000000
2007-01-01	9.976040000000000
2008-01-01	0.666060000000000
2009-01-01	4.045560000000000
2010-01-01	3.206340000000000
2011-01-01	8.588960000000000
2012-01-01	17.050700000000000