Frequencies for first 10,000 rows of popsmas variable in natl1999 dataset :

   PMSA/MSA |
 Population |
       Size |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,147       51.47       51.47
          2 |      1,549       15.49       66.96
          9 |      3,304       33.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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