Year	Number
2004-01-01	2641047
2005-01-01	2858343
2006-01-01	3096271
2007-01-01	3548615
2008-01-01	4128545
2009-01-01	3999528
2010-01-01	4213764
2011-01-01	4403025
2012-01-01	4570808
2013-01-01	4854695
2014-01-01	4668141
2015-01-01	3124818
2016-01-01	3511213
2017-01-01	3431320