Year	Number
2004-01-01	42.0328
2005-01-01	49.2317
2006-01-01	59.9160
2007-01-01	72.6666
2008-01-01	84.1222
2009-01-01	90.5967
2010-01-01	94.2270
2011-01-01	103.6029
2012-01-01	113.3128
2013-01-01	115.8585
2014-01-01	119.6410
2015-01-01	122.9669
2016-01-01	133.4283
2017-01-01	146.9610