Year	Number
2004-01-01	132
2005-01-01	137
2006-01-01	149
2007-01-01	160
2008-01-01	190
2009-01-01	209
2010-01-01	212
2011-01-01	226
2012-01-01	232
2013-01-01	237
2014-01-01	258
2015-01-01	274
2016-01-01	309