Year	Percent
1995-01-01	35.8913
1996-01-01	30.2777
1997-01-01	34.9816
1998-01-01	28.4234
1999-01-01	30.9118
2000-01-01	34.5643
2001-01-01	38.0421
2002-01-01	59.2105
2003-01-01	53.9038
2004-01-01	52.7506
2005-01-01	67.9941
2006-01-01	70.3580
2007-01-01	73.2028
2008-01-01	54.9523
2009-01-01	77.6843
2010-01-01	50.6092
2011-01-01	43.3185
2012-01-01	50.2554
2013-01-01	19.2760
2014-01-01	22.4081
2015-01-01	19.8719