Year	Number
2004-01-01	192
2005-01-01	264
2006-01-01	248
2007-01-01	281
2008-01-01	234
2009-01-01	317
2010-01-01	340
2011-01-01	449
2012-01-01	969
2013-01-01	1041
2014-01-01	1141
2015-01-01	459
2016-01-01	480