Year	Number
2004-01-01	743421
2005-01-01	729061
2006-01-01	898868
2007-01-01	1397493
2008-01-01	2000700
2009-01-01	3464341
2010-01-01	3796125
2011-01-01	4223065
2012-01-01	5865311
2013-01-01	6260243
2014-01-01	6503111
2015-01-01	6203100
2016-01-01	6534653
2017-01-01	7118015