@techreport{Colby2014,
author = {Colby, S.L. and Ortman, J.M.},
title= {Projections of the size and composition of the US population: 2014 to 2060: Population estimates and projections},
year = {2014},
publisher = {US Census Bureau},
address = {Washington, D.C.},
number = {Current Population Reports 25-1143},
}