Year	Number
2004-01-01	33
2005-01-01	44
2006-01-01	46
2007-01-01	59
2008-01-01	70
2009-01-01	82
2010-01-01	92
2011-01-01	103
2012-01-01	119
2013-01-01	143
2014-01-01	151
2015-01-01	178