Survival Data Files

Survival rates based on Coale and Demeny, Regional Model Life Tables and Stable Populations (2nd ed., 1983).

Description of file names:
    "s" is for survival
    "n" (or s, e, w) is for region of Coale-Demeny life table.
    "7" (or other number) is Coale-Demeny life-expectation level
    "e" is power to which base survival rate is raised
    "2" base rate to 2nd power for high mortality of enslavement
    "l" additional fraction of mortality subtracted
    "2" means .02 subtracted from each survival rate in file

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