Frequencies for first 10,000 rows of cntocfip variable in natlterr1999 dataset :

  County of |
 Occurrence |
     (FIPS) |      Freq.     Percent        Cum.
------------+-----------------------------------
      72021 |      1,339       13.39       13.39
      72025 |        799        7.99       21.38
      72031 |        334        3.34       24.72
      72097 |        751        7.51       32.23
      72113 |      1,260       12.60       44.83
      72127 |      2,328       23.28       68.11
      72999 |      3,189       31.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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