Frequencies for first 10,000 rows of prov2885 variable in pos1991 dataset :

    type of |
    control |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        122        1.22        1.22
         01 |      1,262       12.62       13.84
         02 |      1,882       18.82       32.66
         03 |      3,143       31.43       64.09
         04 |      1,400       14.00       78.09
         05 |        434        4.34       82.43
         06 |        532        5.32       87.75
         07 |        575        5.75       93.50
         08 |        222        2.22       95.72
         09 |         25        0.25       95.97
         10 |         95        0.95       96.92
         11 |         57        0.57       97.49
         12 |         11        0.11       97.60
         13 |         16        0.16       97.76
         14 |          1        0.01       97.77
         15 |          3        0.03       97.80
         16 |          1        0.01       97.81
         1A |         13        0.13       97.94
         1B |         17        0.17       98.11
         1C |          6        0.06       98.17
         2A |          6        0.06       98.23
         2B |        176        1.76       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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