Frequencies for first 10,000 rows of cntocfip variable in natlterr2002 dataset :

  County of |
 Occurrence |
     (FIPS) |      Freq.     Percent        Cum.
------------+-----------------------------------
      72021 |      1,299       12.99       12.99
      72025 |        754        7.54       20.53
      72031 |        199        1.99       22.52
      72097 |        653        6.53       29.05
      72113 |      1,202       12.02       41.07
      72127 |      2,612       26.12       67.19
      72999 |      3,281       32.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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