Year	Percent
1996-01-01	40.4075
1997-01-01	43.5258
1998-01-01	34.9157
1999-01-01	33.6224
2000-01-01	39.0357
2001-01-01	40.7343
2002-01-01	27.5456
2003-01-01	25.0705
2004-01-01	23.9996
2005-01-01	21.7407
2006-01-01	13.7515
2007-01-01	17.2532
2008-01-01	14.1394
2009-01-01	22.0644
2010-01-01	16.5912
2011-01-01	17.7578
2012-01-01	20.3819
2013-01-01	20.7395
2014-01-01	20.4931