Year	Number
2004-01-01	71.1464
2005-01-01	78.4235
2006-01-01	89.9527
2007-01-01	107.0070
2008-01-01	126.2175
2009-01-01	114.5123
2010-01-01	120.1426
2011-01-01	130.6610
2012-01-01	144.3893
2013-01-01	153.6455
2014-01-01	156.9816
2015-01-01	153.2381
2016-01-01	149.8513
2017-01-01	149.5126