Year	Number
2004-01-01	6409212
2005-01-01	6941426
2006-01-01	7450828
2007-01-01	8044819
2008-01-01	8525150
2009-01-01	8904850
2010-01-01	9313743
2011-01-01	9849085
2012-01-01	10345163
2013-01-01	10750251
2014-01-01	11154755
2015-01-01	11722576