Year	Number
2006-01-01	12832
2007-01-01	16244
2008-01-01	23044
2009-01-01	27068
2010-01-01	30238
2011-01-01	36300
2012-01-01	44823
2013-01-01	51786
2014-01-01	60783
2015-01-01	70778