Year	Percent
1999-01-01	37.1424
2000-01-01	47.1694
2001-01-01	46.8756
2002-01-01	57.7637
2003-01-01	61.4414
2004-01-01	58.1427
2005-01-01	52.0826
2006-01-01	55.4725
2007-01-01	68.6247
2008-01-01	68.1138
2009-01-01	84.7983
2010-01-01	74.1405
2011-01-01	61.3449
2012-01-01	74.5738
2013-01-01	78.8606
2014-01-01	80.3555
2015-01-01	87.0678
2016-01-01	90.7801