Year	Number
2008-01-01	33599050
2009-01-01	35065151
2010-01-01	37078580
2011-01-01	39710381
2012-01-01	43169600
2013-01-01	43157841
2014-01-01	44434001
2015-01-01	43369235
2016-01-01	41522049
2017-01-01	43216945