Source File Layout: http://www2.census.gov/programs-surveys/popest/technical-documentation/file-layouts/2010-2016/nc-est2016-agesex-res.pdf
Source File: http://www2.census.gov/programs-surveys/popest/datasets/2010-2016/national/asrh/nc-est2016-agesex-res.csv
Source URL: https://www.census.gov/data/datasets/2016/demo/popest/nation-detail.html
ncestagesexres set up by Jean Roth , jroth@nber.org ,  6 Nov 2017