Year	Number
2004-01-01	195
2005-01-01	195
2006-01-01	198
2007-01-01	187
2008-01-01	183
2009-01-01	187
2010-01-01	200
2011-01-01	206
2012-01-01	224
2013-01-01	237
2014-01-01	236
2015-01-01	260