Frequencies for first 10,000 rows of citrspop variable in natlterr2001 dataset :

 Population |
    Size of |
    City of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
          9 |      9,989       99.89       99.89
          Z |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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