Year	Number
2006-01-01	51.2123
2007-01-01	55.6906
2008-01-01	58.9913
2009-01-01	58.0497
2010-01-01	52.0225
2011-01-01	53.1398
2012-01-01	55.3808
2013-01-01	56.0503
2014-01-01	57.7841
2015-01-01	58.9219
2016-01-01	60.1827
2017-01-01	62.5770