Year	Percent
1996-01-01	53.2020
1997-01-01	34.8811
1998-01-01	47.5225
1999-01-01	31.5485
2000-01-01	36.9349
2001-01-01	40.5204
2002-01-01	40.5204
2003-01-01	43.2144
2004-01-01	36.0084
2005-01-01	45.1062
2006-01-01	42.5471
2007-01-01	49.4906
2008-01-01	37.4104
2009-01-01	48.4120
2010-01-01	21.7401
2011-01-01	52.9921
2012-01-01	45.7822
2013-01-01	39.6229
2014-01-01	41.6556