Frequencies for first 10,000 rows of prenatal variable in nhamcsopd1998 dataset :

   prenatal |
instruction |
          s |
 couns/educ |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,474       94.74       94.74
          1 |        526        5.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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