Year	Number
2004-01-01	3232524
2005-01-01	3672195
2006-01-01	4272157
2007-01-01	5136354
2008-01-01	6113820
2009-01-01	5753245
2010-01-01	6275450
2011-01-01	6868247
2012-01-01	7035580
2013-01-01	7271868
2014-01-01	5319210
2015-01-01	5558779
2016-01-01	5731124