Year	Number
2004-01-01	188
2005-01-01	218
2006-01-01	228
2007-01-01	274
2008-01-01	297
2009-01-01	352
2010-01-01	416
2011-01-01	457
2012-01-01	502
2013-01-01	520
2014-01-01	572
2015-01-01	615
2016-01-01	646
2017-01-01	659