Frequencies for first 10,000 rows of mpcb_rec5 variable in natl2003 dataset :

      Month |
   Prenatal |
 Care Began |
 Recode 5 U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,537       75.37       75.37
          2 |      1,416       14.16       89.53
          3 |        458        4.58       94.11
          4 |         35        0.35       94.46
          5 |        554        5.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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