Year	Number
2004-01-01	55841
2005-01-01	67678
2006-01-01	75805
2007-01-01	83903
2008-01-01	92981
2009-01-01	114328
2010-01-01	159880
2011-01-01	176564
2012-01-01	214105
2013-01-01	180812
2014-01-01	201735
2015-01-01	221802