Year	Number
2004-01-01	65.60441322
2005-01-01	68.64313081
2006-01-01	70.39626111
2007-01-01	73.23296438
2008-01-01	71.95292441
2009-01-01	71.88441440
2010-01-01	74.84283490
2011-01-01	73.69903793