Year	Percent
1996-01-01	36.8126
1997-01-01	32.9761
1998-01-01	32.4505
1999-01-01	33.6774
2000-01-01	30.4300
2001-01-01	35.7903
2002-01-01	37.9725
2003-01-01	35.2068
2004-01-01	38.9263
2005-01-01	36.3061
2006-01-01	40.7274
2007-01-01	38.8673
2008-01-01	27.3640
2009-01-01	32.7286
2010-01-01	29.1944
2011-01-01	32.0628
2012-01-01	42.8358
2013-01-01	57.3022
2014-01-01	37.9722