Year	Percent
2000-01-01	44.5298579035086
2001-01-01	45.2296940498514
2002-01-01	45.2583331142421
2003-01-01	45.3649644189605
2004-01-01	45.9413675328228
2005-01-01	47.0484706146041
2006-01-01	48.0513739146931
2007-01-01	50.9825183922000
2008-01-01	49.5286753476671
2009-01-01	44.3962439821352
2010-01-01	42.2299166618575
2011-01-01	41.2587521511075
2012-01-01	40.9639119392233
2013-01-01	42.1055022967638