Year	Percent
1996-01-01	40.9711
1997-01-01	46.7355
1998-01-01	43.9903
1999-01-01	46.5563
2000-01-01	35.5508
2001-01-01	29.5400
2002-01-01	27.3417
2003-01-01	37.4535
2004-01-01	23.4874
2005-01-01	35.1123
2006-01-01	34.5536
2007-01-01	33.0181
2008-01-01	27.0936
2009-01-01	34.1117
2010-01-01	25.5732
2011-01-01	24.0105
2012-01-01	21.4739
2013-01-01	17.4647
2014-01-01	11.7569
2015-01-01	11.6471
2016-01-01	12.6631