Year	Percent
2003-01-01	3.90847544520610
2004-01-01	4.09915799174478
2005-01-01	4.11416163624080
2006-01-01	4.04809971756075
2007-01-01	3.61992713029348
2008-01-01	3.34309777725101
2009-01-01	3.98290902323091
2010-01-01	4.10611793095665
2011-01-01	4.10055934026890
2012-01-01	4.24683398429132
2013-01-01	4.14327054922760