Frequencies for first 10,000 rows of rcnty_pop variable in natlterr2008 dataset :

 Population |
         of |
  Residence |
 County U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |        396        3.96        3.96
          3 |      6,804       68.04       72.00
          9 |      2,785       27.85       99.85
          Z |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016