Year	Number
2004-01-01	54.4053
2005-01-01	108.4471
2006-01-01	57.7323
2007-01-01	61.5021
2008-01-01	69.0355
2009-01-01	71.0131
2010-01-01	78.6375
2011-01-01	90.5108
2012-01-01	105.4342
2013-01-01	112.2407
2014-01-01	126.5108
2015-01-01	141.1673
2016-01-01	161.2496