Frequencies for first 10,000 rows of prov0875 variable in pos1991 dataset :

    general |
 supervisor |
- 6 yrs exp |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,966       89.66       89.66
          1 |        407        4.07       93.73
          2 |        261        2.61       96.34
          3 |        115        1.15       97.49
          4 |         64        0.64       98.13
          5 |         33        0.33       98.46
          6 |         35        0.35       98.81
          7 |         17        0.17       98.98
          8 |         17        0.17       99.15
          9 |         59        0.59       99.74
         10 |          2        0.02       99.76
         12 |          2        0.02       99.78
         13 |          4        0.04       99.82
         14 |          3        0.03       99.85
         15 |          1        0.01       99.86
         18 |          2        0.02       99.88
         19 |          2        0.02       99.90
         21 |          3        0.03       99.93
         22 |          2        0.02       99.95
         25 |          1        0.01       99.96
         34 |          2        0.02       99.98
         47 |          1        0.01       99.99
         54 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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