Frequencies for first 10,000 rows of ocntypop variable in natlterr2007 dataset :

  Occurence |
     County |
 Population |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      2,672       26.72       26.72
          2 |      1,118       11.18       37.90
          3 |      4,973       49.73       87.63
          9 |      1,237       12.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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