Year	Number
2005-01-01	958
2006-01-01	1086
2007-01-01	1320
2008-01-01	1531
2009-01-01	1658
2010-01-01	2319
2011-01-01	2837
2012-01-01	3233
2013-01-01	3581
2014-01-01	3900
2015-01-01	4054
2016-01-01	4743