Frequencies for first 10,000 rows of popsmas variable in natl1992 dataset :

   PMSA/MSA |
 Population |
       Size |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,596       45.96       45.96
          2 |      2,320       23.20       69.16
          9 |      3,083       30.83       99.99
          Z |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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