Year	Number
2004-01-01	48165
2005-01-01	64216
2006-01-01	75489
2007-01-01	81192
2008-01-01	86802
2009-01-01	103353
2010-01-01	144793
2011-01-01	169391
2012-01-01	184066
2013-01-01	150089
2014-01-01	177594
2015-01-01	183038