Year	Number
2004-01-01	303671
2005-01-01	501273
2006-01-01	574557
2007-01-01	576721
2008-01-01	595767
2009-01-01	440173
2010-01-01	363037
2011-01-01	269612
2012-01-01	271780
2013-01-01	259422
2014-01-01	214025
2015-01-01	184382
2016-01-01	165955
2017-01-01	148304