Frequencies for first 10,000 rows of u_apncu variable in natlterr2007 dataset :

Adequacy of |
   Prenatal |
       Care |
Utilization |
  Index RFP |
669=f_mpcb_ |
        u U |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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