Year	Number
2004-01-01	8445
2005-01-01	11689
2006-01-01	19205
2007-01-01	140357
2008-01-01	179518
2009-01-01	221457
2010-01-01	355437
2011-01-01	669189
2012-01-01	746233
2013-01-01	967350
2014-01-01	873059