Year	Number
2005-01-01	683856
2006-01-01	1000915
2007-01-01	1219310
2008-01-01	1395440
2009-01-01	1682522
2010-01-01	1803534
2011-01-01	2126081
2012-01-01	2358742
2013-01-01	3311806
2014-01-01	3600873
2015-01-01	4405157
2016-01-01	5262377
2017-01-01	4857290