Year	Number
2007-01-01	8540
2008-01-01	5972
2009-01-01	6351
2010-01-01	5446
2011-01-01	6166
2012-01-01	35129
2013-01-01	40904
2014-01-01	89248
2015-01-01	102848
2016-01-01	263714
2017-01-01	277790