Frequencies for first 10,000 rows of popsmas variable in natlterr1999 dataset :

   PMSA/MSA |
 Population |
       Size |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,905       69.05       69.05
          2 |      1,410       14.10       83.15
          9 |      1,674       16.74       99.89
          Z |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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