Year	Percent
2000-01-01	7.06991352252515
2001-01-01	5.98604186279518
2002-01-01	3.75017465778467
2003-01-01	5.30238773219937
2004-01-01	8.47021063584075
2005-01-01	9.59909986064424
2006-01-01	9.14019966777727
2007-01-01	11.12693474461210
2008-01-01	19.82620312874220
2009-01-01	3.68700160498791
2010-01-01	5.45485546150218
2011-01-01	8.08238798099110
2012-01-01	7.19355053338952
2013-01-01	7.13546785289400
2014-01-01	6.03596861798431
2015-01-01	3.99737996694398
2016-01-01	3.52317317628476
2017-01-01	3.85067166284725