Year	Number
2004-01-01	515741
2005-01-01	607662
2006-01-01	797788
2007-01-01	1049549
2008-01-01	1192860
2009-01-01	1193424
2010-01-01	1045976
2011-01-01	1174756
2012-01-01	1228157
2013-01-01	1213627
2014-01-01	1070559
2015-01-01	990629
2016-01-01	983245
2017-01-01	1089330