Frequencies for first 10,000 rows of prov2885 variable in posclia2009 dataset :

    type of |
    control |      Freq.     Percent        Cum.
------------+-----------------------------------
         01 |        221        2.21        2.21
         02 |        943        9.43       11.64
         03 |        362        3.62       15.26
         04 |      7,519       75.19       90.45
         05 |        101        1.01       91.46
         06 |        254        2.54       94.00
         07 |        240        2.40       96.40
         08 |        142        1.42       97.82
         09 |        107        1.07       98.89
         10 |        111        1.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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