Year	Number
2004-01-01	166733
2005-01-01	184504
2006-01-01	221857
2007-01-01	262468
2008-01-01	289609
2009-01-01	310667
2010-01-01	356645
2011-01-01	433262
2012-01-01	480330
2013-01-01	479307
2014-01-01	500565
2015-01-01	552412
2016-01-01	605012