Year	Number
2004-01-01	11
2005-01-01	55
2006-01-01	60
2007-01-01	83
2008-01-01	88
2009-01-01	117
2010-01-01	130
2011-01-01	181
2012-01-01	212
2013-01-01	246
2014-01-01	297
2015-01-01	353
2016-01-01	479
2017-01-01	621