Year	Number
2005-01-01	59
2006-01-01	71
2007-01-01	84
2008-01-01	130
2009-01-01	159
2010-01-01	180
2011-01-01	211
2012-01-01	238
2013-01-01	278
2014-01-01	292
2015-01-01	294