Year	Number
2004-01-01	290
2005-01-01	353
2006-01-01	574
2007-01-01	915
2008-01-01	1056
2009-01-01	1367
2010-01-01	1550
2011-01-01	1622
2012-01-01	1679
2013-01-01	1790
2014-01-01	2094
2015-01-01	2343
2016-01-01	2499