Cohort life tables data as provided by SSA.
lifetables
A data frame with nine variables:
xage in years
qxprobability of death at age x
lxnumber of survivors, of birth cohort of 100,000, at next integral age
dxnumber of deaths that would occur between integral ages
LxNumber of person-years lived between x and x+1
TxTotal number of person-years lived beyond age x
exAverage number of years of life remaining for members of cohort alive at age x
sexSex
yearYear
For further details, see http://www.ssa.gov/oact/NOTES/as120/LifeTables_Body.html#wp1168594