Frequencies for first 10,000 rows of ssamsasz variable in posclia2009 dataset :

    ssa msa |
  size code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,892       28.92       28.92
          A |          2        0.02       28.94
          B |      1,594       15.94       44.88
          C |      2,090       20.90       65.78
          D |      1,680       16.80       82.58
          E |      1,658       16.58       99.16
          F |         84        0.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016