Year	Number
2005-01-01	232
2006-01-01	235
2007-01-01	277
2008-01-01	393
2009-01-01	430
2010-01-01	473
2011-01-01	503
2012-01-01	556
2013-01-01	642
2014-01-01	662
2015-01-01	690