Year	Number
2004-01-01	989
2005-01-01	1292
2006-01-01	1255
2007-01-01	1428
2008-01-01	2112
2009-01-01	2669
2010-01-01	3406
2011-01-01	4957
2012-01-01	6075
2013-01-01	17058
2014-01-01	18593
2015-01-01	10406
2016-01-01	80501
2017-01-01	20998