Frequencies for first 10,000 rows of cmsa variable in natlterr1999 dataset :

    CMSA of |
  Residence |
     (FIPS) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,685       36.85       36.85
         87 |      6,315       63.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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