Year	Number
2007-01-01	20.0577
2008-01-01	22.1224
2009-01-01	44.4708
2010-01-01	51.2634
2011-01-01	59.7959
2012-01-01	71.5022
2013-01-01	91.9872
2014-01-01	127.3404
2015-01-01	146.7301