Year	Percent
1996-01-01	32.6617
1997-01-01	30.3594
1998-01-01	32.2803
1999-01-01	10.5824
2000-01-01	14.6315
2001-01-01	36.9171
2002-01-01	76.7241
2003-01-01	82.5992
2004-01-01	73.4987
2005-01-01	59.4594
2006-01-01	44.2664
2007-01-01	49.4331
2008-01-01	44.2801
2009-01-01	50.0558
2010-01-01	55.9495
2011-01-01	54.0699
2012-01-01	46.5776
2013-01-01	24.0701
2014-01-01	22.8756