Year	Percent
2002-01-01	18.2454
2003-01-01	16.7654
2004-01-01	16.5098
2005-01-01	13.8598
2006-01-01	14.1469
2007-01-01	12.5990
2008-01-01	11.8874
2009-01-01	12.9961
2010-01-01	12.9035
2011-01-01	12.7173