Frequencies for first 10,000 rows of prov2885 variable in pos2001 dataset :

    type of |
    control |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        101        1.01        1.01
         01 |      1,915       19.15       20.16
         02 |      1,298       12.98       33.14
         03 |      2,868       28.68       61.82
         04 |      1,358       13.58       75.40
         05 |        504        5.04       80.44
         06 |        913        9.13       89.57
         07 |        297        2.97       92.54
         08 |        199        1.99       94.53
         09 |         16        0.16       94.69
         10 |          1        0.01       94.70
         11 |         12        0.12       94.82
         12 |          7        0.07       94.89
         13 |          4        0.04       94.93
         1A |         47        0.47       95.40
         1B |        150        1.50       96.90
         1C |         23        0.23       97.13
         2A |          5        0.05       97.18
         2B |        280        2.80       99.98
         2C |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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