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

    CMSA of |
  Residence |
     (FIPS) |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,995       99.95       99.95
         07 |          1        0.01       99.96
         14 |          1        0.01       99.97
         21 |          1        0.01       99.98
         70 |          1        0.01       99.99
         84 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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