Frequencies for first 10,000 rows of prov2885 variable in posclia2010 dataset :

    type of |
    control |      Freq.     Percent        Cum.
------------+-----------------------------------
         01 |        216        2.16        2.16
         02 |        915        9.15       11.31
         03 |        375        3.75       15.06
         04 |      7,533       75.33       90.39
         05 |        106        1.06       91.45
         06 |        248        2.48       93.93
         07 |        247        2.47       96.40
         08 |        142        1.42       97.82
         09 |        112        1.12       98.94
         10 |        106        1.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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