Year	Number
2004-01-01	42
2005-01-01	93
2006-01-01	109
2007-01-01	253
2008-01-01	285
2009-01-01	298
2010-01-01	360
2011-01-01	380
2012-01-01	403
2013-01-01	417
2014-01-01	399
2015-01-01	365
2016-01-01	371
2017-01-01	390