Year	Number
2004-01-01	525
2005-01-01	1607
2006-01-01	3911
2007-01-01	9007
2008-01-01	16555
2009-01-01	22485
2010-01-01	38150
2011-01-01	52473
2012-01-01	128773
2013-01-01	124761
2014-01-01	188155