Frequencies for first 10,000 rows of cityres variable in natl1985 dataset :

  NCHS City |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
        004 |          1        0.01        0.01
        008 |        665        6.65        6.66
        010 |          1        0.01        6.67
        021 |        444        4.44       11.11
        023 |        606        6.06       17.17
        024 |        343        3.43       20.60
        047 |          1        0.01       20.61
        121 |          1        0.01       20.62
        999 |      7,938       79.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016