Year	Percent
1996-01-01	29.2514
1997-01-01	34.4151
1998-01-01	38.2064
1999-01-01	37.0930
2000-01-01	38.4480
2001-01-01	34.3937
2002-01-01	27.9221
2003-01-01	25.6946
2004-01-01	22.1150
2005-01-01	23.0392
2006-01-01	26.4997
2007-01-01	31.6380
2008-01-01	26.7791
2009-01-01	23.4213
2010-01-01	27.1587
2011-01-01	20.9374
2012-01-01	31.8586
2013-01-01	35.4754
2014-01-01	28.4601