Frequencies for first 10,000 rows of mrcityfips variable in natlterr2003 dataset :

   Mother's |
   Place of |
  Residence |
 (FIPS) U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
      99999 |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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