Year	Number
2004-01-01	465.625
2005-01-01	468.750
2006-01-01	434.375
2007-01-01	496.875
2008-01-01	509.375
2009-01-01	531.250
2010-01-01	575.000
2011-01-01	612.500
2012-01-01	675.000
2013-01-01	668.750
2014-01-01	643.750
2015-01-01	659.375
2016-01-01	671.875
2017-01-01	687.500