Frequencies for first 10,000 rows of precare5 variable in natl2016 dataset :

      Month |
   Prenatal |
 Care Began |
   Recode 1 |
 1st to 3rd |
      month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,412       74.12       74.12
          2 |      1,866       18.66       92.78
          3 |        485        4.85       97.63
          4 |         84        0.84       98.47
          5 |        153        1.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 4 Oct 2017