Year	Number
2006-01-01	87
2007-01-01	113
2008-01-01	201
2009-01-01	286
2010-01-01	542
2011-01-01	956
2012-01-01	1291
2013-01-01	1635
2014-01-01	2018
2015-01-01	2404
2016-01-01	2806