Frequencies for first 10,000 rows of prov2885 variable in pos2004 dataset :

    type of |
    control |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        102        1.02        1.02
         01 |      2,049       20.49       21.51
         02 |      1,002       10.02       31.53
         03 |      2,803       28.03       59.56
         04 |      1,522       15.22       74.78
         05 |        517        5.17       79.95
         06 |        973        9.73       89.68
         07 |        228        2.28       91.96
         08 |        197        1.97       93.93
         09 |         17        0.17       94.10
         10 |          4        0.04       94.14
         11 |         12        0.12       94.26
         12 |          8        0.08       94.34
         13 |          6        0.06       94.40
         1A |         54        0.54       94.94
         1B |        169        1.69       96.63
         1C |         25        0.25       96.88
         2A |          5        0.05       96.93
         2B |        305        3.05       99.98
         2C |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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