Frequencies for first 10,000 rows of prov0900 variable in pos1993 dataset :

    general |
 supervisor |
- qualified |
        dir |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,903       99.03       99.03
          1 |         64        0.64       99.67
          2 |         15        0.15       99.82
          3 |          8        0.08       99.90
          4 |          7        0.07       99.97
          8 |          1        0.01       99.98
         10 |          1        0.01       99.99
         14 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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