Year	Number
2004-01-01	1124
2005-01-01	1692
2006-01-01	2267
2007-01-01	4364
2008-01-01	6234
2009-01-01	6961
2010-01-01	7605
2011-01-01	8110
2012-01-01	8652
2013-01-01	8965
2014-01-01	9206
2015-01-01	9146
2016-01-01	9561
2017-01-01	9698