Frequencies for first 10,000 rows of prov2885 variable in pos1999 dataset :

    type of |
    control |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        110        1.10        1.10
         01 |      1,803       18.03       19.13
         02 |      1,494       14.94       34.07
         03 |      2,829       28.29       62.36
         04 |      1,339       13.39       75.75
         05 |        500        5.00       80.75
         06 |        883        8.83       89.58
         07 |        329        3.29       92.87
         08 |        197        1.97       94.84
         09 |         17        0.17       95.01
         10 |          1        0.01       95.02
         11 |         10        0.10       95.12
         12 |          7        0.07       95.19
         13 |          4        0.04       95.23
         1A |         45        0.45       95.68
         1B |        142        1.42       97.10
         1C |         22        0.22       97.32
         2A |          5        0.05       97.37
         2B |        262        2.62       99.99
         2C |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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