Year	Number
2004-01-01	157131
2005-01-01	175056
2006-01-01	197616
2007-01-01	228249
2008-01-01	353369
2009-01-01	395106
2010-01-01	439406
2011-01-01	500023
2012-01-01	544246
2013-01-01	607404
2014-01-01	664670
2015-01-01	693368
2016-01-01	758018
2017-01-01	817306