Year	Number
2004-01-01	130
2005-01-01	151
2006-01-01	145
2007-01-01	244
2008-01-01	263
2009-01-01	261
2010-01-01	266
2011-01-01	313
2012-01-01	318
2013-01-01	513
2014-01-01	554
2015-01-01	562