Frequencies for first 10,000 rows of popsmas variable in natl1993 dataset :

   PMSA/MSA |
 Population |
       Size |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,397       43.97       43.97
          2 |      2,220       22.20       66.17
          9 |      3,383       33.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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