Year	Number
2004-01-01	2188
2005-01-01	2721
2006-01-01	3284
2007-01-01	7373
2008-01-01	9817
2009-01-01	12516
2010-01-01	17565
2011-01-01	34080
2012-01-01	36776
2013-01-01	58430
2014-01-01	42657