Year	Number
2004-01-01	177154
2005-01-01	266642
2006-01-01	341565
2007-01-01	426014
2008-01-01	434741
2009-01-01	395651
2010-01-01	532991
2011-01-01	533954
2012-01-01	628367
2013-01-01	695562
2014-01-01	721771
2015-01-01	810727
2016-01-01	1135052