Frequencies for fipscounty variable in countyct1999 dataset :

FIPS County |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
      09000 |          1       11.11       11.11
      09001 |          1       11.11       22.22
      09003 |          1       11.11       33.33
      09005 |          1       11.11       44.44
      09007 |          1       11.11       55.56
      09009 |          1       11.11       66.67
      09011 |          1       11.11       77.78
      09013 |          1       11.11       88.89
      09015 |          1       11.11      100.00
------------+-----------------------------------
      Total |          9      100.00

by Jean Roth , jroth@nber.org , 23 Jun 2017