Frequencies for first 10,000 rows of f_mpcb_u variable in natlterr2007 dataset :

      Month |
   Prenatal |
 Care Began |
      (mpcb |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,841       38.41       38.41
          1 |      6,159       61.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015