Year	Percent
2000-01-01	2.94712186806239
2001-01-01	2.25143437098756
2002-01-01	2.75569161737831
2003-01-01	3.68219077686975
2004-01-01	4.55794834620046
2005-01-01	4.72445770384021
2006-01-01	3.90610011645836
2007-01-01	3.17978793309621
2008-01-01	2.75120877330924
2009-01-01	3.41302766193765
2010-01-01	4.45051396356325
2011-01-01	4.97664800290076
2012-01-01	5.82069882514604
2013-01-01	7.24269625058486
2014-01-01	7.41631920047793
2015-01-01	6.87228015990856
2016-01-01	6.00791030515347
2017-01-01	4.84041817736702