Frequencies for first 10,000 rows of lfdrflg variable in natl1977 dataset :

    Date of |
 Last Fetal |
  Death (by |
State) flag |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          4        0.04        0.04
          1 |      9,996       99.96      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016