Year	Number
2007-01-01	152550
2008-01-01	347922
2009-01-01	318404
2010-01-01	299879
2011-01-01	277595
2012-01-01	292496
2013-01-01	284705
2014-01-01	271720
2015-01-01	266996
2016-01-01	282198
2017-01-01	331817