Frequencies for first 10,000 rows of popsmas variable in natl1994 dataset :

   PMSA/MSA |
 Population |
       Size |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,066       50.66       50.66
          2 |      1,502       15.02       65.68
          9 |      3,430       34.30       99.98
          Z |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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