Year	Number
2007-01-01	18182660
2008-01-01	21157555
2009-01-01	30117662
2010-01-01	40987286
2011-01-01	47793118
2012-01-01	86412775
2013-01-01	92837414
2014-01-01	97640557
2015-01-01	100919729
2016-01-01	144538325
2017-01-01	148429449