Year	Percent
1996-01-01	36.6355
1997-01-01	35.7020
1998-01-01	22.2806
1999-01-01	26.4926
2000-01-01	27.4496
2001-01-01	23.5206
2002-01-01	23.3243
2003-01-01	23.4089
2004-01-01	36.1056
2005-01-01	58.9649
2006-01-01	71.0860
2007-01-01	67.7639
2008-01-01	54.8952
2009-01-01	60.3169
2010-01-01	48.5340
2011-01-01	42.2109
2012-01-01	38.5809
2013-01-01	39.4233
2014-01-01	39.3572
2015-01-01	38.8790
2016-01-01	42.6388