Year	Number
2004-01-01	23805
2005-01-01	18097
2006-01-01	14326
2007-01-01	11922
2008-01-01	9213
2009-01-01	6277
2010-01-01	4157
2011-01-01	2690
2012-01-01	2449
2013-01-01	2316
2014-01-01	2212
2015-01-01	2107
2016-01-01	2021
2017-01-01	1959