Year	Percent
2003-01-01	6.277102947
2004-01-01	10.380472180
2005-01-01	14.681278230
2006-01-01	18.259738920
2007-01-01	21.454086300
2008-01-01	26.725515370
2009-01-01	30.444740300
2010-01-01	31.428737640
2011-01-01	32.671562190