Year	Number
2006-01-01	17.0693
2007-01-01	20.3595
2008-01-01	22.7065
2009-01-01	24.6700
2010-01-01	27.0799
2011-01-01	30.0326
2012-01-01	31.3986
2013-01-01	33.2592
2014-01-01	35.4319
2015-01-01	36.2163
2016-01-01	32.7179