Year	Number
2004-01-01	188
2005-01-01	260
2006-01-01	347
2007-01-01	495
2008-01-01	647
2009-01-01	787
2010-01-01	845
2011-01-01	1144
2012-01-01	1205
2013-01-01	1303
2014-01-01	1328
2015-01-01	1404
2016-01-01	1479