Frequencies for first 10,000 rows of ssamsasz variable in posclia2010 dataset :

    ssa msa |
  size code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,936       29.36       29.36
          A |          2        0.02       29.38
          B |      1,441       14.41       43.79
          C |      2,101       21.01       64.80
          D |      1,739       17.39       82.19
          E |      1,712       17.12       99.31
          F |         69        0.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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