Year	Number
2007-01-01	31516
2008-01-01	77516
2009-01-01	103797
2010-01-01	141194
2011-01-01	228601
2012-01-01	327530
2013-01-01	284791
2014-01-01	418653
2015-01-01	497265
2016-01-01	988106