Year	Percent
1996-01-01	49.6424
1997-01-01	53.4736
1998-01-01	50.0863
1999-01-01	52.5555
2000-01-01	43.9557
2001-01-01	41.0839
2002-01-01	45.5391
2003-01-01	39.9098
2004-01-01	42.9127
2005-01-01	41.7977
2006-01-01	42.4844
2007-01-01	43.7061
2008-01-01	42.9853
2009-01-01	40.2662
2010-01-01	42.4856
2011-01-01	44.8409
2012-01-01	59.8991
2013-01-01	60.6476
2014-01-01	62.5203