Year	Number
2004-01-01	54
2005-01-01	84
2006-01-01	133
2007-01-01	186
2008-01-01	295
2009-01-01	431
2010-01-01	489
2011-01-01	521
2012-01-01	643
2013-01-01	744
2014-01-01	863
2015-01-01	962
2016-01-01	1016