Frequencies for first 10,000 rows of cityres variable in natl1993 dataset :

  NCHS City |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
        008 |        708        7.08        7.08
        014 |          2        0.02        7.10
        021 |        377        3.77       10.87
        023 |        515        5.15       16.02
        024 |        651        6.51       22.53
        026 |          1        0.01       22.54
        028 |          1        0.01       22.55
        060 |          1        0.01       22.56
        999 |      7,744       77.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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