Year	Number
2004-01-01	1968
2005-01-01	4977
2006-01-01	3980
2007-01-01	6049
2008-01-01	8112
2009-01-01	17098
2010-01-01	35627
2011-01-01	54875
2012-01-01	64675
2013-01-01	94853
2014-01-01	228467
2015-01-01	242015
2016-01-01	206461
2017-01-01	142879