Frequencies for first 10,000 rows of prov2885 variable in pos2006 dataset :

    type of |
    control |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         92        0.92        0.92
         01 |      1,638       16.38       17.30
         02 |      1,020       10.20       27.50
         03 |      2,887       28.87       56.37
         04 |      1,711       17.11       73.48
         05 |        533        5.33       78.81
         06 |      1,044       10.44       89.25
         07 |        235        2.35       91.60
         08 |        203        2.03       93.63
         09 |         19        0.19       93.82
         10 |          5        0.05       93.87
         11 |         11        0.11       93.98
         12 |          7        0.07       94.05
         13 |         10        0.10       94.15
         1A |         53        0.53       94.68
         1B |        186        1.86       96.54
         1C |         23        0.23       96.77
         2A |          5        0.05       96.82
         2B |        316        3.16       99.98
         2C |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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