Year	Number
2004-01-01	219
2005-01-01	240
2006-01-01	229
2007-01-01	162
2008-01-01	321
2009-01-01	398
2010-01-01	462
2011-01-01	424
2012-01-01	407
2013-01-01	395
2014-01-01	523
2015-01-01	628
2016-01-01	642