Frequencies for first 10,000 rows of precare variable in natlterr2008 dataset :

      Month |
   Prenatal |
 Care Began |
        RFP |
 668=f_mpcb |
          R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          8        0.08        0.08
          1 |        325        3.25        3.33
          2 |      1,424       14.24       17.57
          3 |      1,166       11.66       29.23
          4 |        504        5.04       34.27
          5 |        229        2.29       36.56
          6 |        134        1.34       37.90
          7 |         60        0.60       38.50
          8 |         42        0.42       38.92
          9 |          8        0.08       39.00
         99 |         39        0.39       39.39
          . |      6,061       60.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016