Frequencies for first 10,000 rows of countycc variable in sf12010880us26 dataset :

FIPS County |
Class Code8 |      Freq.     Percent        Cum.
------------+-----------------------------------
         C7 |        177        1.77        1.77
         H1 |      8,750       87.50       89.27
         H4 |        756        7.56       96.83
         H6 |        317        3.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017