Frequencies for first 10,000 rows of prenatal variable in namcs2000 dataset :

   prenatal |
instruction |
          s |
 couns/educ |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,912       99.12       99.12
          1 |         88        0.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016