Year	Number
2008-01-01	64.1326
2009-01-01	69.2008
2010-01-01	71.1501
2011-01-01	74.2690
2012-01-01	77.7778
2013-01-01	83.8207
2014-01-01	84.6004
2015-01-01	86.1598
2016-01-01	88.6940
2017-01-01	91.2281