Year	Number
2004-01-01	197
2005-01-01	217
2006-01-01	244
2007-01-01	275
2008-01-01	295
2009-01-01	323
2010-01-01	340
2011-01-01	368
2012-01-01	362
2013-01-01	400
2014-01-01	419
2015-01-01	424
2016-01-01	434
2017-01-01	442