Year	Percent
1999-01-01	10.1090
2000-01-01	16.1411
2001-01-01	15.5956
2002-01-01	16.4397
2003-01-01	21.0926
2004-01-01	27.0772
2005-01-01	31.5565
2006-01-01	44.4527
2007-01-01	47.9027
2008-01-01	22.3242
2009-01-01	40.9911
2010-01-01	53.1314
2011-01-01	41.4700
2012-01-01	54.4325
2013-01-01	61.0559
2014-01-01	62.2846
2015-01-01	70.2057
2016-01-01	72.7549