Year	Percent
2003-01-01	52.1980
2004-01-01	49.4433
2005-01-01	47.9594
2006-01-01	45.8336
2007-01-01	55.4899
2008-01-01	70.5368
2009-01-01	85.1486
2010-01-01	87.7383
2011-01-01	81.0892