Year	Number
2004-01-01	182314
2005-01-01	199092
2006-01-01	288160
2007-01-01	306948
2008-01-01	342747
2009-01-01	420351
2010-01-01	436686
2011-01-01	445759
2012-01-01	454712
2013-01-01	473875
2014-01-01	475837
2015-01-01	481719
2016-01-01	465130