Year	Number
2004-01-01	11786723.2666
2005-01-01	13215385.6714
2006-01-01	18755582.4717
2007-01-01	20976978.2502
2008-01-01	21424231.7985
2009-01-01	22621180.5409
2010-01-01	26058876.0554
2011-01-01	28792175.9926
2012-01-01	30900324.0000
2013-01-01	33915534.1160
2014-01-01	36474979.0000
2015-01-01	41270701.0000
2016-01-01	43298975.0000