Year	Number
2004-01-01	5043
2005-01-01	3315
2006-01-01	3030
2007-01-01	4132
2008-01-01	4899
2009-01-01	9043
2010-01-01	16817
2011-01-01	18093
2012-01-01	29027
2013-01-01	41543
2014-01-01	54488
2015-01-01	33786
2016-01-01	41575