Year	Number
2004-01-01	115
2005-01-01	184
2006-01-01	330
2007-01-01	486
2008-01-01	816
2009-01-01	1267
2010-01-01	2121
2011-01-01	3797
2012-01-01	4217
2013-01-01	5273
2014-01-01	6259
2015-01-01	7790
2016-01-01	8999