Year	Number
2004-01-01	173
2005-01-01	170
2006-01-01	178
2007-01-01	202
2008-01-01	228
2009-01-01	248
2010-01-01	266
2011-01-01	286
2012-01-01	314
2013-01-01	345
2014-01-01	379
2015-01-01	391
2016-01-01	407