Frequencies for first 10,000 rows of prov1375 variable in pos1995 dataset :

 technician |
   trainees |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,934       99.34       99.34
          1 |         34        0.34       99.68
          2 |         13        0.13       99.81
          3 |          7        0.07       99.88
          4 |          5        0.05       99.93
          5 |          2        0.02       99.95
          8 |          1        0.01       99.96
         13 |          1        0.01       99.97
         15 |          1        0.01       99.98
         21 |          1        0.01       99.99
         50 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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