Year	Percent
1996-01-01	58.8287
1997-01-01	52.9038
1998-01-01	40.3553
1999-01-01	40.0138
2000-01-01	26.0059
2001-01-01	25.6984
2002-01-01	29.6061
2003-01-01	73.9702
2004-01-01	68.0715
2005-01-01	60.2649
2006-01-01	46.0589
2007-01-01	50.7867
2008-01-01	67.6818
2009-01-01	42.1788
2010-01-01	38.5018
2011-01-01	39.1276
2012-01-01	37.9913
2013-01-01	54.4244
2014-01-01	53.7414