Year	Number
2004-01-01	375
2005-01-01	375
2006-01-01	390
2007-01-01	552
2008-01-01	555
2009-01-01	752
2010-01-01	850
2011-01-01	1245
2012-01-01	1460
2013-01-01	1486
2014-01-01	1547
2015-01-01	1672
2016-01-01	1869