Year	Percent
2000-01-01	30.06
2001-01-01	27.32
2002-01-01	21.97
2003-01-01	26.50
2004-01-01	28.05
2005-01-01	30.61
2006-01-01	42.13
2007-01-01	39.96
2008-01-01	22.05
2009-01-01	39.63
2010-01-01	42.07
2011-01-01	31.91
2012-01-01	38.84
2013-01-01	44.20
2014-01-01	49.44
2015-01-01	56.23
2016-01-01	55.67