Year	Number
2004-01-01	254334
2005-01-01	187344
2006-01-01	211066
2007-01-01	247053
2008-01-01	741834
2009-01-01	704972
2010-01-01	583543
2011-01-01	593763
2012-01-01	609463
2013-01-01	671451
2014-01-01	1022131
2015-01-01	999182
2016-01-01	958321