Year	Number
2004-01-01	300
2005-01-01	285
2006-01-01	294
2007-01-01	284
2008-01-01	279
2009-01-01	264
2010-01-01	254
2011-01-01	227
2012-01-01	231
2013-01-01	272
2014-01-01	240
2015-01-01	200
2016-01-01	197
2017-01-01	201