Year	Number
2004-01-01	1
2005-01-01	287
2006-01-01	851
2007-01-01	933
2008-01-01	3132
2009-01-01	3223
2010-01-01	3349
2011-01-01	3708
2012-01-01	4721
2013-01-01	5851
2014-01-01	5085
2015-01-01	5640
2016-01-01	13187