Frequencies for first 10,000 rows of mpcb variable in natlterr2006 dataset :

      Month |
   Prenatal |
 Care Began |
        RFP |
669=f_mpcb_ |
        u U |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        316        3.16        3.16
          1 |        670        6.70        9.86
          2 |      1,109       11.09       20.95
          3 |        819        8.19       29.14
          4 |        593        5.93       35.07
          5 |        536        5.36       40.43
          6 |        282        2.82       43.25
          7 |        203        2.03       45.28
          8 |        157        1.57       46.85
          9 |        104        1.04       47.89
         99 |      1,486       14.86       62.75
          . |      3,725       37.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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