Year	Percent
2000-01-01	36.0768050335362
2001-01-01	36.9356114574390
2002-01-01	37.5065041839622
2003-01-01	37.8410238514923
2004-01-01	38.4367748823574
2005-01-01	39.7908473393658
2006-01-01	40.6840575720668
2007-01-01	43.9094822301826
2008-01-01	43.4774706765813
2009-01-01	40.5467029341574
2010-01-01	38.9356222109994
2011-01-01	38.1377364538581
2012-01-01	37.8507344105702
2013-01-01	38.4468712085492