Year	Number
2004-01-01	638288
2005-01-01	779130
2006-01-01	924435
2007-01-01	1169681
2008-01-01	1648815
2009-01-01	2067783
2010-01-01	2877166
2011-01-01	3378219
2012-01-01	3938609
2013-01-01	4576187
2014-01-01	5903711
2015-01-01	6708299