Year	Number
2004-01-01	619
2005-01-01	727
2006-01-01	832
2007-01-01	1088
2008-01-01	1219
2009-01-01	1427
2010-01-01	1669
2011-01-01	1778
2012-01-01	1857
2013-01-01	1952
2014-01-01	2084
2015-01-01	2268
2016-01-01	2381