Year	Percent
1996-01-01	39.5449
1997-01-01	46.6498
1998-01-01	33.5674
1999-01-01	42.3495
2000-01-01	42.2409
2001-01-01	39.2901
2002-01-01	41.9635
2003-01-01	45.5234
2004-01-01	43.0434
2005-01-01	55.4274
2006-01-01	57.2460
2007-01-01	55.0405
2008-01-01	54.9813
2009-01-01	42.9269
2010-01-01	40.1659
2011-01-01	66.3677
2012-01-01	47.7205
2013-01-01	44.5026
2014-01-01	44.0232