Frequencies for first 10,000 rows of cntocfip variable in natl1994 dataset :

  County of |
 Occurrence |
     (FIPS) |      Freq.     Percent        Cum.
------------+-----------------------------------
      01015 |        325        3.25        3.25
      01073 |      2,319       23.19       26.44
      01089 |        878        8.78       35.22
      01097 |      1,009       10.09       45.31
      01101 |      1,038       10.38       55.69
      01103 |        175        1.75       57.44
      01125 |        448        4.48       61.92
      01999 |      3,808       38.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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