Year	Percent
2000-01-01	18.30980
2001-01-01	19.89525
2002-01-01	24.26540
2003-01-01	34.03568
2004-01-01	44.61927
2005-01-01	52.50704
2006-01-01	60.17865
2007-01-01	66.77183
2008-01-01	67.34312
2009-01-01	63.42467
2010-01-01	60.40690