Year	Percent
2002-01-01	0.004593
2003-01-01	0.460000
2004-01-01	0.880000
2005-01-01	1.240000
2006-01-01	3.070000
2007-01-01	3.520000
2008-01-01	3.800000
2009-01-01	4.950000
2010-01-01	5.840000
2011-01-01	6.040000
2012-01-01	6.290000
2013-01-01	6.420000
2014-01-01	6.810000
2015-01-01	6.920000
2016-01-01	6.950000