Frequencies for first 10,000 rows of mpcb_rec6 variable in natl2004 dataset :

      Month |
   Prenatal |
 Care Began |
 Recode 6 U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,642       56.42       56.42
          2 |      1,897       18.97       75.39
          3 |      1,378       13.78       89.17
          4 |        392        3.92       93.09
          5 |         36        0.36       93.45
          6 |        655        6.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 21 Jan 2016