Year	Number
2007-01-01	7165
2008-01-01	4482
2009-01-01	4659
2010-01-01	3516
2011-01-01	4072
2012-01-01	30168
2013-01-01	36143
2014-01-01	82297
2015-01-01	97453
2016-01-01	257499
2017-01-01	272907