Frequencies for first 10,000 rows of popsmas variable in natlterr1994 dataset :

   PMSA/MSA |
 Population |
       Size |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,929       69.29       69.29
          2 |      1,410       14.10       83.39
          9 |      1,653       16.53       99.92
          Z |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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