Year	Number
2005-01-01	938
2006-01-01	1141
2007-01-01	1277
2008-01-01	1459
2009-01-01	1588
2010-01-01	1613
2011-01-01	1728
2012-01-01	1821
2013-01-01	2049
2014-01-01	2190
2015-01-01	2280