Frequencies for first 10,000 rows of cntocfip variable in natlterr1996 dataset :

  County of |
 Occurrence |
     (FIPS) |      Freq.     Percent        Cum.
------------+-----------------------------------
      72021 |      1,362       13.62       13.62
      72025 |        843        8.43       22.05
      72031 |        353        3.53       25.58
      72097 |        844        8.44       34.02
      72113 |      1,180       11.80       45.82
      72127 |      2,187       21.87       67.69
      72999 |      3,231       32.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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