Frequencies for first 10,000 rows of cityres variable in natl1999 dataset :

  NCHS City |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
        008 |        730        7.30        7.30
        012 |          2        0.02        7.32
        023 |        347        3.47       10.79
        027 |          1        0.01       10.80
        028 |        521        5.21       16.01
        029 |        581        5.81       21.82
        999 |      7,818       78.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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