Year	Percent
1996-01-01	41.1985
1997-01-01	31.1475
1998-01-01	33.8824
1999-01-01	22.1640
2000-01-01	27.0141
2001-01-01	30.2813
2002-01-01	33.3725
2003-01-01	37.1138
2004-01-01	36.7018
2005-01-01	35.9296
2006-01-01	29.2415
2007-01-01	33.3317
2008-01-01	34.2186
2009-01-01	30.4155
2010-01-01	28.3791
2011-01-01	27.2376
2012-01-01	27.4419
2013-01-01	24.9233
2014-01-01	28.3849