Year	Number
2004-01-01	2905369
2005-01-01	3158938
2006-01-01	3512490
2007-01-01	3838235
2008-01-01	4043520
2009-01-01	4181641
2010-01-01	4300269
2011-01-01	4617266
2012-01-01	5042497
2013-01-01	5237801
2014-01-01	5763430
2015-01-01	6273297
2016-01-01	6498322