Frequencies for first 10,000 rows of mpre5 variable in natlterr2000 dataset :

      Month |
   Prenatal |
 Care Began |
   Recode 5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,668       76.68       76.68
          2 |      1,957       19.57       96.25
          3 |        261        2.61       98.86
          4 |         84        0.84       99.70
          5 |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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