Year	Number
2004-01-01	341
2005-01-01	385
2006-01-01	449
2007-01-01	513
2008-01-01	591
2009-01-01	643
2010-01-01	679
2011-01-01	836
2012-01-01	883
2013-01-01	1912
2014-01-01	2134
2015-01-01	1593