Year	Number
2004-01-01	48.33674679
2005-01-01	54.54119283
2006-01-01	65.46326103
2007-01-01	79.16782466
2008-01-01	96.05867383
2009-01-01	120.55575170
2010-01-01	149.63766440
2011-01-01	176.72663250
2012-01-01	204.01417450
2013-01-01	230.18233330
2014-01-01	256.96208010