Year	Number
2004-01-01	76
2005-01-01	93
2006-01-01	106
2007-01-01	124
2008-01-01	176
2009-01-01	245
2010-01-01	293
2011-01-01	338
2012-01-01	381
2013-01-01	408
2014-01-01	417
2015-01-01	418