Frequencies for first 10,000 rows of cntyrfip variable in natlterr1996 dataset :

  County of |
  Residence |
     (FIPS) |      Freq.     Percent        Cum.
------------+-----------------------------------
      00000 |          5        0.05        0.05
      09000 |          1        0.01        0.06
      12000 |          1        0.01        0.07
      20000 |          1        0.01        0.08
      34000 |          1        0.01        0.09
      36000 |          1        0.01        0.10
      51000 |          1        0.01        0.11
      72021 |        585        5.85        5.96
      72025 |        373        3.73        9.69
      72031 |        434        4.34       14.03
      72097 |        261        2.61       16.64
      72113 |        576        5.76       22.40
      72127 |      1,054       10.54       32.94
      72999 |      6,701       67.01       99.95
      78999 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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