Year	Number
2004-01-01	38980
2005-01-01	46066
2006-01-01	52935
2007-01-01	64979
2008-01-01	69439
2009-01-01	75443
2010-01-01	83783
2011-01-01	97394
2012-01-01	106076
2013-01-01	117808
2014-01-01	134851
2015-01-01	149463
2016-01-01	156776