Frequencies for first 10,000 rows of cntrspop variable in natlterr2000 dataset :

 Population |
    Size of |
  County of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |      1,042       10.42       10.42
          3 |      2,168       21.68       32.10
          9 |      6,790       67.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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