Frequencies for first 10,000 rows of precare_rec variable in natl2011 dataset :

      Month |
   Prenatal |
 Care Began |
 Recode RFP |
 668=f_mpcb |
          R |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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