Frequencies for first 10,000 rows of rcnty_pop variable in natlterr2005 dataset :

 Population |
         of |
  Residence |
 County U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |        377        3.77        3.77
          3 |      6,997       69.97       73.74
          9 |      2,606       26.06       99.80
          Z |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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