Year	Number
2004-01-01	502570
2005-01-01	594921
2006-01-01	803117
2007-01-01	1131603
2008-01-01	1459780
2009-01-01	1334543
2010-01-01	1178418
2011-01-01	1403634
2012-01-01	1807229
2013-01-01	1753127
2014-01-01	1837581
2015-01-01	1946943
2016-01-01	1997299