Frequencies for first 10,000 rows of cityres variable in natl1991 dataset :

  NCHS City |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
        008 |        907        9.07        9.07
        013 |          1        0.01        9.08
        016 |          1        0.01        9.09
        021 |        508        5.08       14.17
        023 |        121        1.21       15.38
        024 |        635        6.35       21.73
        030 |          1        0.01       21.74
        052 |          1        0.01       21.75
        999 |      7,825       78.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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