Frequencies for first 10,000 rows of cntyrfip variable in natl1998 dataset :

  County of |
  Residence |
     (FIPS) |      Freq.     Percent        Cum.
------------+-----------------------------------
      01015 |        266        2.66        2.66
      01073 |      1,507       15.07       17.73
      01089 |        673        6.73       24.46
      01097 |      1,084       10.84       35.30
      01101 |        589        5.89       41.19
      01103 |        268        2.68       43.87
      01125 |        355        3.55       47.42
      01999 |      5,117       51.17       98.59
      06095 |          2        0.02       98.61
      12005 |          1        0.01       98.62
      12033 |          1        0.01       98.63
      12073 |          1        0.01       98.64
      12091 |          1        0.01       98.65
      12103 |          1        0.01       98.66
      12999 |         25        0.25       98.91
      13999 |         16        0.16       99.07
      18097 |          1        0.01       99.08
      28047 |          1        0.01       99.09
      28059 |         22        0.22       99.31
      28999 |         30        0.30       99.61
      37051 |          1        0.01       99.62
      39093 |          1        0.01       99.63
      39113 |          1        0.01       99.64
      47149 |          1        0.01       99.65
      47999 |         33        0.33       99.98
      51999 |          1        0.01       99.99
      53063 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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