Year	Number
2004-01-01	1797676
2005-01-01	2632973
2006-01-01	3178720
2007-01-01	3277215
2008-01-01	3352250
2009-01-01	2691616
2010-01-01	2260758
2011-01-01	1919207
2012-01-01	1830342
2013-01-01	1641901
2014-01-01	1662200
2015-01-01	1632185
2016-01-01	1818140