Year	Number
2009-01-01	1371730
2010-01-01	1245328
2011-01-01	1213715
2012-01-01	1391611
2013-01-01	1395725
2014-01-01	1464245
2015-01-01	1871073
2016-01-01	2150112
2017-01-01	2194381