Frequencies for first 10,000 rows of ocntypop variable in natlterr2010 dataset :

  Occurence |
     County |
 Population |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      2,305       23.05       23.05
          2 |      1,188       11.88       34.93
          3 |      5,087       50.87       85.80
          9 |      1,420       14.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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