Year	Number
2004-01-01	693
2005-01-01	1120
2006-01-01	1853
2007-01-01	2777
2008-01-01	3577
2009-01-01	4238
2010-01-01	4786
2011-01-01	5423
2012-01-01	6243
2013-01-01	7634
2014-01-01	9050
2015-01-01	10793
2016-01-01	12371