Frequencies for first 10,000 rows of ocntypop variable in natlterr2003 dataset :

  Occurence |
     County |
 Population |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |      2,833       28.33       28.33
          3 |      3,993       39.93       68.26
          9 |      3,174       31.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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