Frequencies for first 10,000 rows of prov2885 variable in posclia2006 dataset :

    type of |
    control |      Freq.     Percent        Cum.
------------+-----------------------------------
         01 |        218        2.18        2.18
         02 |      1,043       10.43       12.61
         03 |        347        3.47       16.08
         04 |      7,485       74.85       90.93
         05 |         94        0.94       91.87
         06 |        248        2.48       94.35
         07 |        214        2.14       96.49
         08 |        132        1.32       97.81
         09 |        101        1.01       98.82
         10 |        118        1.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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