Frequencies for first 10,000 rows of prov0900 variable in pos1995 dataset :

    general |
 supervisor |
- qualified |
        dir |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,908       99.08       99.08
          1 |         60        0.60       99.68
          2 |         14        0.14       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