Year	Number
2004-01-01	2294
2005-01-01	2725
2006-01-01	4243
2007-01-01	5386
2008-01-01	17193
2009-01-01	8246
2010-01-01	9936
2011-01-01	10234
2012-01-01	14253
2013-01-01	17080
2014-01-01	16592
2015-01-01	9623
2016-01-01	10359