Year	Number
2004-01-01	124191
2005-01-01	187551
2006-01-01	253287
2007-01-01	329832
2008-01-01	415003
2009-01-01	504323
2010-01-01	518189
2011-01-01	573510
2012-01-01	631808
2013-01-01	696799
2014-01-01	720128