Year	Number
2004-01-01	29678
2005-01-01	33651
2006-01-01	36450
2007-01-01	42182
2008-01-01	45968
2009-01-01	46895
2010-01-01	48967
2011-01-01	48748
2012-01-01	50635
2013-01-01	52463
2014-01-01	51873
2015-01-01	51917
2016-01-01	52782