Frequencies for first 10,000 rows of precare variable in natlterr2012 dataset :

      Month |
   Prenatal |
 Care Began |
        RFP |
 668=f_mpcb |
          R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        299        2.99        2.99
          1 |        594        5.94        8.93
          2 |      2,164       21.64       30.57
          3 |      2,234       22.34       52.91
          4 |      1,042       10.42       63.33
          5 |        546        5.46       68.79
          6 |        389        3.89       72.68
          7 |        278        2.78       75.46
          8 |        204        2.04       77.50
          9 |        110        1.10       78.60
         10 |         33        0.33       78.93
         99 |        944        9.44       88.37
          . |      1,163       11.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016