Frequencies for first 10,000 rows of cityres variable in natl1996 dataset :

  NCHS City |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
        008 |        705        7.05        7.05
        012 |          1        0.01        7.06
        023 |        436        4.36       11.42
        025 |          2        0.02       11.44
        028 |        538        5.38       16.82
        029 |        560        5.60       22.42
        030 |          1        0.01       22.43
        034 |          1        0.01       22.44
        041 |          1        0.01       22.45
        056 |          1        0.01       22.46
        140 |          1        0.01       22.47
        195 |          1        0.01       22.48
        999 |      7,752       77.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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