Year	Number
2004-01-01	15680
2005-01-01	22172
2006-01-01	22963
2007-01-01	17745
2008-01-01	15920
2009-01-01	13704
2010-01-01	13313
2011-01-01	20047
2012-01-01	20158
2013-01-01	25243
2014-01-01	27603
2015-01-01	27111
2016-01-01	34959