Year	Number
2004-01-01	19341
2005-01-01	21624
2006-01-01	24420
2007-01-01	28741
2008-01-01	32633
2009-01-01	39461
2010-01-01	47835
2011-01-01	69231
2012-01-01	86935
2013-01-01	115009
2014-01-01	98900
2015-01-01	127378
2016-01-01	144588