Year	Number
2006-01-01	2239553
2007-01-01	2650331
2008-01-01	2936138
2009-01-01	3280008
2010-01-01	3746090
2011-01-01	3806894
2012-01-01	4226337
2013-01-01	4451859
2014-01-01	4883635
2015-01-01	5134581
2016-01-01	5251605