Year	Number
2004-01-01	14.1241
2005-01-01	20.8038
2006-01-01	22.6973
2007-01-01	44.8250
2008-01-01	48.7255
2009-01-01	61.2805
2010-01-01	69.4228
2011-01-01	81.0002
2012-01-01	96.8304
2013-01-01	101.3535
2014-01-01	140.0698
2015-01-01	159.9313