Year	Number
2004-01-01	2420207
2005-01-01	2404093
2006-01-01	2678721
2007-01-01	3136515
2008-01-01	3229292
2009-01-01	3403657
2010-01-01	3641365
2011-01-01	3850599
2012-01-01	4129148
2013-01-01	4426797
2014-01-01	5111115
2015-01-01	5792290
2016-01-01	6133402