Year	Percent
1996-01-01	44.5775
1997-01-01	23.1505
1998-01-01	23.5951
1999-01-01	19.9993
2000-01-01	42.9488
2001-01-01	41.0074
2002-01-01	53.1206
2003-01-01	52.7657
2004-01-01	55.2576
2005-01-01	47.6302
2006-01-01	46.3591
2007-01-01	47.4281
2008-01-01	34.8094
2009-01-01	33.5486
2010-01-01	38.5704
2011-01-01	39.8830
2012-01-01	49.5053
2013-01-01	47.0056
2014-01-01	46.1336
2015-01-01	42.3404
2016-01-01	44.1606