Year	Number
2004-01-01	5
2005-01-01	49
2006-01-01	54
2007-01-01	76
2008-01-01	81
2009-01-01	108
2010-01-01	120
2011-01-01	167
2012-01-01	209
2013-01-01	243
2014-01-01	285
2015-01-01	340
2016-01-01	466
2017-01-01	608