Frequencies for first 10,000 rows of precare5 variable in natlterr2014 dataset 

      Month |
   Prenatal |
 Care Began |
   Recode 1 |
 1st to 3rd |
      month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,847       58.47       58.47
          2 |      1,909       19.09       77.56
          3 |        680        6.80       84.36
          4 |        151        1.51       85.87
          5 |        336        3.36       89.23
          . |      1,077       10.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016