Year	Number
2004-01-01	33147
2005-01-01	52194
2006-01-01	76217
2007-01-01	148679
2008-01-01	197577
2009-01-01	200823
2010-01-01	207430
2011-01-01	227495
2012-01-01	282920
2013-01-01	312455
2014-01-01	371190
2015-01-01	444493
2016-01-01	479078
2017-01-01	509660