Year	Number
2004-01-01	243
2005-01-01	290
2006-01-01	349
2007-01-01	435
2008-01-01	670
2009-01-01	863
2010-01-01	991
2011-01-01	1084
2012-01-01	1227
2013-01-01	1377
2014-01-01	1419
2015-01-01	1407
2016-01-01	1518
2017-01-01	1637