Year	Number
2004-01-01	47
2005-01-01	79
2006-01-01	98
2007-01-01	146
2008-01-01	139
2009-01-01	130
2010-01-01	162
2011-01-01	166
2012-01-01	164
2013-01-01	151
2014-01-01	180
2015-01-01	175