Frequencies for first 10,000 rows of county variable in usracesingleagesadj dataset :

County FIPS |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
      01001 |        573        5.73        5.73
      01003 |        798        7.98       13.71
      01005 |        464        4.64       18.35
      01007 |        382        3.82       22.17
      01009 |        509        5.09       27.26
      01011 |        395        3.95       31.21
      01013 |        398        3.98       35.19
      01015 |        784        7.84       43.03
      01017 |        433        4.33       47.36
      01019 |        408        4.08       51.44
      01021 |        479        4.79       56.23
      01023 |        380        3.80       60.03
      01025 |        441        4.41       64.44
      01027 |        377        3.77       68.21
      01029 |        363        3.63       71.84
      01031 |        682        6.82       78.66
      01033 |        554        5.54       84.20
      01035 |        394        3.94       88.14
      01037 |        361        3.61       91.75
      01039 |        486        4.86       96.61
      01041 |        339        3.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 2 Jan 2018