Frequencies for first 10,000 rows of popsmas variable in natlterr1998 dataset :

   PMSA/MSA |
 Population |
       Size |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,002       70.02       70.02
          2 |      1,421       14.21       84.23
          9 |      1,568       15.68       99.91
          Z |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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