Frequencies for first 10,000 rows of mpcb variable in natl2007 dataset :

      Month |
   Prenatal |
 Care Began |
        RFP |
669=f_mpcb_ |
        u U |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         35        0.35        0.35
          1 |      2,707       27.07       27.42
          2 |      3,143       31.43       58.85
          3 |      1,884       18.84       77.69
          4 |        732        7.32       85.01
          5 |        428        4.28       89.29
          6 |        237        2.37       91.66
          7 |        198        1.98       93.64
          8 |        140        1.40       95.04
          9 |        110        1.10       96.14
         99 |        386        3.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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