Frequencies for first 10,000 rows of prenatal variable in namcs1999 dataset :

   prenatal |
instruction |
          s |
 couns/educ |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,936       99.36       99.36
          1 |         64        0.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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