Year	Number
2004-01-01	1160552
2005-01-01	1360749
2006-01-01	1591582
2007-01-01	1799681
2008-01-01	1995775
2009-01-01	2168011
2010-01-01	2132255
2011-01-01	2163550
2012-01-01	2177877
2013-01-01	2043303
2014-01-01	1497262
2015-01-01	1858996