Frequencies for first 10,000 rows of mpcb variable in linkpe2009psden dataset :

      Month |
   Prenatal |
 Care Began |
U (f_mpcb_u |
  rep flag) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        198        1.98        1.98
          1 |        778        7.78        9.76
          2 |        764        7.64       17.40
          3 |        627        6.27       23.67
          4 |        322        3.22       26.89
          5 |        284        2.84       29.73
          6 |        184        1.84       31.57
          7 |        126        1.26       32.83
          8 |         54        0.54       33.37
          9 |         25        0.25       33.62
         99 |         60        0.60       34.22
          . |      6,578       65.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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