Year	Number
2004-01-01	1000000
2005-01-01	1682916
2006-01-01	3329616
2007-01-01	4123432
2008-01-01	6428509
2009-01-01	8481137
2010-01-01	11881114
2011-01-01	14250503
2012-01-01	15861417
2013-01-01	21800556
2014-01-01	28438292
2015-01-01	35194496
2016-01-01	41311199