Year	Number
2006-01-01	150
2007-01-01	205
2008-01-01	240
2009-01-01	305
2010-01-01	335
2011-01-01	378
2012-01-01	435
2013-01-01	488
2014-01-01	549
2015-01-01	592
2016-01-01	622