Year	Number
2004-01-01	241
2005-01-01	282
2006-01-01	327
2007-01-01	346
2008-01-01	377
2009-01-01	425
2010-01-01	545
2011-01-01	604
2012-01-01	645
2013-01-01	783
2014-01-01	1053
2015-01-01	1096