Year	Number
2006-01-01	8877967
2007-01-01	10196423
2008-01-01	11419094
2009-01-01	12886734
2010-01-01	14752760
2011-01-01	16932964
2012-01-01	19044740
2013-01-01	21623510
2014-01-01	24680204
2015-01-01	28354297
2016-01-01	32826708