Year	Percent
2000-01-01	14.40952894756450
2001-01-01	16.87308900862140
2002-01-01	19.11196658532830
2003-01-01	18.95785981915080
2004-01-01	18.18467782298190
2005-01-01	16.59253038971110
2006-01-01	12.95999860181220
2007-01-01	8.99723429782799
2008-01-01	6.43296223613550
2009-01-01	7.75851782623949
2010-01-01	9.32813949665889
2011-01-01	9.01219210680111
2012-01-01	9.42159058469881
2013-01-01	9.68815112879008
2014-01-01	8.50191929880374
2015-01-01	7.33391100511064
2016-01-01	6.10961417089406
2017-01-01	4.87187852261603