Frequencies for first 10,000 rows of prov2885 variable in pos1998 dataset :

    type of |
    control |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        121        1.21        1.21
         01 |      1,778       17.78       18.99
         02 |      1,528       15.28       34.27
         03 |      2,857       28.57       62.84
         04 |      1,328       13.28       76.12
         05 |        495        4.95       81.07
         06 |        848        8.48       89.55
         07 |        334        3.34       92.89
         08 |        213        2.13       95.02
         09 |         18        0.18       95.20
         10 |          1        0.01       95.21
         11 |         10        0.10       95.31
         12 |          6        0.06       95.37
         13 |          5        0.05       95.42
         1A |         42        0.42       95.84
         1B |        134        1.34       97.18
         1C |         21        0.21       97.39
         2A |          5        0.05       97.44
         2B |        254        2.54       99.98
         2C |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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