Frequencies for first 10,000 rows of cntocfip variable in natl2000 dataset :

  County of |
 Occurrence |
     (FIPS) |      Freq.     Percent        Cum.
------------+-----------------------------------
      01015 |        305        3.05        3.05
      01073 |      2,341       23.41       26.46
      01089 |        755        7.55       34.01
      01097 |      1,215       12.15       46.16
      01101 |      1,015       10.15       56.31
      01103 |        321        3.21       59.52
      01125 |        518        5.18       64.70
      01999 |      3,530       35.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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