Frequencies for first 10,000 rows of precare5 variable in natl2015 dataset :

      Month |
   Prenatal |
 Care Began |
   Recode 1 |
 1st to 3rd |
      month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,211       72.11       72.11
          2 |      1,939       19.39       91.50
          3 |        469        4.69       96.19
          4 |        101        1.01       97.20
          5 |        280        2.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016