Frequencies for first 10,000 rows of prov4470 variable in posclia2006 dataset :

     survey |
certificate |
   schedule |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,311       93.11       93.11
          A |        167        1.67       94.78
          B |          4        0.04       94.82
          C |        121        1.21       96.03
          D |         13        0.13       96.16
          E |         72        0.72       96.88
          F |         29        0.29       97.17
          G |         22        0.22       97.39
          H |         59        0.59       97.98
          I |          6        0.06       98.04
          J |          5        0.05       98.09
          V |        191        1.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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