Year	Percent
2002-01-01	6.43370
2003-01-01	9.39592
2004-01-01	12.13800
2005-01-01	20.18110
2006-01-01	35.99850
2007-01-01	45.45670
2008-01-01	49.28990
2009-01-01	35.10710
2010-01-01	35.81070
2011-01-01	41.73810
2012-01-01	42.21580
2013-01-01	43.46860
2014-01-01	36.63860
2015-01-01	28.75990
2016-01-01	26.86260
2017-01-01	31.56360