Year	Number
2004-01-01	47.9305
2005-01-01	48.6503
2006-01-01	49.3026
2007-01-01	51.9572
2008-01-01	52.3826
2009-01-01	54.8152
2010-01-01	61.5051
2011-01-01	61.9954
2012-01-01	61.3908
2013-01-01	60.2713
2014-01-01	59.5026
2015-01-01	60.0823
2016-01-01	57.6912