Year	Number
2004-01-01	1675
2005-01-01	1870
2006-01-01	2005
2007-01-01	2141
2008-01-01	2334
2009-01-01	3238
2010-01-01	4689
2011-01-01	12615
2012-01-01	21481
2013-01-01	8374
2014-01-01	10215
2015-01-01	13138
2016-01-01	35527