Year	Number
2004-01-01	456843
2005-01-01	801233
2006-01-01	825407
2007-01-01	1033797
2008-01-01	1045456
2009-01-01	1164717
2010-01-01	1331883
2011-01-01	1634277
2012-01-01	1966995
2013-01-01	2364426
2014-01-01	2883359
2015-01-01	3182485
2016-01-01	3509801