Year	Number
2004-01-01	579
2005-01-01	560
2006-01-01	464
2007-01-01	477
2008-01-01	492
2009-01-01	504
2010-01-01	524
2011-01-01	580
2012-01-01	655
2013-01-01	989
2014-01-01	1246
2015-01-01	1252
2016-01-01	1283