Year	Percent
2005-01-01	2.94952430058730
2006-01-01	2.98733720878618
2007-01-01	3.18153846410196
2008-01-01	3.15545172441502
2009-01-01	4.34205403556103
2010-01-01	4.31842033360466
2011-01-01	4.24860208338694
2012-01-01	4.04217048280022
2013-01-01	4.14267028574565
2014-01-01	4.07181685954478
2015-01-01	3.76686416547635
2016-01-01	3.39115123378043
2017-01-01	3.13037156780841