Year	Number
2004-01-01	23.5568
2005-01-01	24.0875
2006-01-01	24.7767
2007-01-01	24.6214
2008-01-01	26.2783
2009-01-01	26.3689
2010-01-01	26.2947
2011-01-01	27.0974
2012-01-01	27.7224
2013-01-01	28.2144
2014-01-01	28.0922
2015-01-01	27.4576
2016-01-01	25.9422
2017-01-01	24.7118