Year	Number
2004-01-01	2171974
2005-01-01	2303307
2006-01-01	2958372
2007-01-01	3257784
2008-01-01	3383361
2009-01-01	3668604
2010-01-01	4040168
2011-01-01	4501515
2012-01-01	4775096
2013-01-01	5098683
2014-01-01	5319090
2015-01-01	5384584
2016-01-01	5860298