Year	Number
2004-01-01	143
2005-01-01	143
2006-01-01	143
2007-01-01	163
2008-01-01	193
2009-01-01	213
2010-01-01	241
2011-01-01	309
2012-01-01	315
2013-01-01	351
2014-01-01	371
2015-01-01	377