Year	Number
2004-01-01	27
2005-01-01	59
2006-01-01	78
2007-01-01	108
2008-01-01	137
2009-01-01	154
2010-01-01	167
2011-01-01	193
2012-01-01	219
2013-01-01	238
2014-01-01	280
2015-01-01	323
2016-01-01	373
2017-01-01	422