Frequencies for first 10,000 rows of cntocfip variable in natl1996 dataset :

  County of |
 Occurrence |
     (FIPS) |      Freq.     Percent        Cum.
------------+-----------------------------------
      01015 |        330        3.30        3.30
      01073 |      2,350       23.50       26.80
      01089 |        855        8.55       35.35
      01097 |      1,211       12.11       47.46
      01101 |        981        9.81       57.27
      01103 |        227        2.27       59.54
      01125 |        372        3.72       63.26
      01999 |      3,674       36.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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