Year	Number
2005-01-01	2289
2006-01-01	4458
2007-01-01	7468
2008-01-01	9917
2009-01-01	12959
2010-01-01	17133
2011-01-01	20623
2012-01-01	26626
2013-01-01	30173
2014-01-01	33773
2015-01-01	40369
2016-01-01	43924
2017-01-01	47374