Year	Number
2004-01-01	69
2005-01-01	76
2006-01-01	84
2007-01-01	88
2008-01-01	97
2009-01-01	94
2010-01-01	91
2011-01-01	119
2012-01-01	134
2013-01-01	134
2014-01-01	134
2015-01-01	150
2016-01-01	218
2017-01-01	233