@article{Martin2017,
author = {Martin, J.A., Hamilton, B.E., Osterman, M.J.K., Driscoll, A.K., and Matthews, T.J. },
title= {Births: Final data for 2015},
year = {2017},
URL = {https://www.cdc.gov/nchs/data/nvsr/nvsr66/nvsr66_01.pdf},
journal = {National Vital Statistics Reports },
volume = {66},
number = {1},
pages = {1--70},
}