Year	Number
2004-01-01	29.3456
2005-01-01	27.9458
2006-01-01	38.1022
2007-01-01	42.4283
2008-01-01	41.9379
2009-01-01	41.7017
2010-01-01	39.3366
2011-01-01	131.2178
2012-01-01	180.9859
2013-01-01	248.9402
2014-01-01	233.1325
2015-01-01	213.5696
2016-01-01	270.2825