Year	Number
2004-01-01	171031
2005-01-01	214343
2006-01-01	243280
2007-01-01	268334
2008-01-01	281774
2009-01-01	294985
2010-01-01	303710
2011-01-01	342690
2012-01-01	409617
2013-01-01	456570
2014-01-01	457079
2015-01-01	513387
2016-01-01	666100