Year	Percent
1999-01-01	0.0028510000000000002
2000-01-01	0.0164710000000000000
2001-01-01	0.0317350000000000000
2002-01-01	0.0142510000000000000
2003-01-01	0.0208010000000000000
2004-01-01	0.0200150000000000000
2005-01-01	0.0406520000000000000
2006-01-01	0.0460370000000000000
2007-01-01	0.2953070000000000400
2008-01-01	0.1600079999999999800
2009-01-01	0.1927470000000000000
2010-01-01	0.2432340000000000000
2011-01-01	0.2202390000000000000
2012-01-01	0.2384970000000000000
2013-01-01	0.1406960000000000200
2014-01-01	0.2148060000000000000
2015-01-01	0.2060550000000000200
2016-01-01	0.2471930000000000000