Frequencies for first 10,000 rows of precare_rec variable in natl2013 dataset :

      Month |
   Prenatal |
 Care Began |
 Recode RFP |
 668=f_mpcb |
          R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,763       67.63       67.63
          2 |      2,131       21.31       88.94
          3 |        543        5.43       94.37
          4 |        106        1.06       95.43
          5 |        457        4.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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