Frequencies for first 10,000 rows of prov0900 variable in pos1991 dataset :

    general |
 supervisor |
- qualified |
        dir |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,943       99.43       99.43
          1 |         35        0.35       99.78
          2 |         11        0.11       99.89
          3 |          5        0.05       99.94
          4 |          4        0.04       99.98
          8 |          1        0.01       99.99
         10 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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