Year	Number
2004-01-01	1773
2005-01-01	2741
2006-01-01	9898
2007-01-01	22809
2008-01-01	29664
2009-01-01	29208
2010-01-01	31568
2011-01-01	32880
2012-01-01	36182
2013-01-01	49124
2014-01-01	56005
2015-01-01	56798
2016-01-01	59323