Year	Percent
1996-01-01	39.7291
1997-01-01	54.5106
1998-01-01	48.7055
1999-01-01	44.0367
2000-01-01	63.4956
2001-01-01	47.9297
2002-01-01	36.4734
2003-01-01	34.4121
2004-01-01	63.1143
2005-01-01	49.3151
2006-01-01	42.1484
2007-01-01	34.1689
2008-01-01	37.6860
2009-01-01	44.6533
2010-01-01	42.3699
2011-01-01	36.3861
2012-01-01	42.0976
2013-01-01	44.0736
2014-01-01	44.2452