Frequencies for first 10,000 rows of cityres variable in natl2002 dataset :

    City of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
        001 |      4,132       41.32       41.32
        008 |         20        0.20       41.52
        023 |          3        0.03       41.55
        028 |          2        0.02       41.57
        029 |          9        0.09       41.66
        999 |      5,834       58.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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