Year	Number
2007-01-01	20.7284
2008-01-01	22.7090
2009-01-01	23.4776
2010-01-01	24.7312
2011-01-01	25.0425
2012-01-01	25.0050
2013-01-01	25.1104
2014-01-01	25.3925
2015-01-01	24.4221
2016-01-01	27.1225