Year	Percent
2005-01-01	29.9863628536792
2006-01-01	31.7946801803895
2007-01-01	32.4923059222672
2008-01-01	34.1729231461384
2009-01-01	35.0672954109807
2010-01-01	39.1325682472025
2011-01-01	41.4722793836230
2012-01-01	45.1472275505826
2013-01-01	45.6000256287122
2014-01-01	46.8869227147133
2015-01-01	47.2680808687689
2016-01-01	46.9497738628029
2017-01-01	48.6292868323654