Year	Percent
1996-01-01	60.3195
1997-01-01	70.8831
1998-01-01	93.8207
1999-01-01	58.5987
2000-01-01	49.1566
2001-01-01	52.5597
2002-01-01	49.8424
2003-01-01	50.9434
2004-01-01	44.2265
2005-01-01	75.3247
2006-01-01	45.5862
2007-01-01	31.5311
2008-01-01	21.7242
2009-01-01	11.7662
2010-01-01	18.9192
2011-01-01	17.3063
2012-01-01	26.5952
2013-01-01	31.2229
2014-01-01	27.7644
2015-01-01	21.1634
2016-01-01	21.9751