Year	Number
2004-01-01	10644
2005-01-01	25473
2006-01-01	59086
2007-01-01	118789
2008-01-01	146133
2009-01-01	138262
2010-01-01	39737
2011-01-01	65149
2012-01-01	113756
2013-01-01	122789
2014-01-01	140780
2015-01-01	173594
2016-01-01	200264
2017-01-01	274856