Year	Number
2004-01-01	2.1623
2005-01-01	35.3812
2006-01-01	57.6078
2007-01-01	81.0132
2008-01-01	121.2749
2009-01-01	192.5977
2010-01-01	214.1804
2011-01-01	276.7744
2012-01-01	453.9416
2013-01-01	472.4250
2014-01-01	499.0936
2015-01-01	731.7202