Year	Number
2004-01-01	38.5135
2005-01-01	43.2915
2006-01-01	46.2355
2007-01-01	49.6622
2008-01-01	55.3089
2009-01-01	58.6873
2010-01-01	59.7008
2011-01-01	60.5695
2012-01-01	64.1892
2013-01-01	71.0425
2014-01-01	72.1042
2015-01-01	78.1853
2016-01-01	81.0328