Year	Number
2006-01-01	161646
2007-01-01	179645
2008-01-01	194270
2009-01-01	195072
2010-01-01	178338
2011-01-01	185431
2012-01-01	196762
2013-01-01	202707
2014-01-01	212512
2015-01-01	220090
2016-01-01	228184
2017-01-01	237262