Year	Number
2005-01-01	7576490
2006-01-01	8068387
2007-01-01	9364207
2008-01-01	11096780
2009-01-01	9861505
2010-01-01	9402649
2011-01-01	7836516
2012-01-01	9437020
2013-01-01	12734019
2014-01-01	14550431
2015-01-01	15546552
2016-01-01	18920773
2017-01-01	20221332