Year	Number
2004-01-01	0
2005-01-01	1999700
2006-01-01	2141287
2007-01-01	2654042
2008-01-01	3019504
2009-01-01	3004628
2010-01-01	2763350
2011-01-01	2655401
2012-01-01	2734408
2013-01-01	2786268
2014-01-01	2822090
2015-01-01	2750103
2016-01-01	2741782
2017-01-01	2746505