Year	Number
2007-01-01	1055
2008-01-01	2493
2009-01-01	1646
2010-01-01	2710
2011-01-01	3244
2012-01-01	3118
2013-01-01	3221
2014-01-01	2622
2015-01-01	2218
2016-01-01	2344
2017-01-01	2444