Frequencies for first 10,000 rows of ssamsasz variable in posclia2008 dataset :

    ssa msa |
  size code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,864       28.64       28.64
          A |          2        0.02       28.66
          B |      1,774       17.74       46.40
          C |      2,068       20.68       67.08
          D |      1,611       16.11       83.19
          E |      1,587       15.87       99.06
          F |         94        0.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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