Frequencies for first 10,000 rows of prov0880 variable in pos1995 dataset :

    general |
 supervisor |
 - cytotech |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,801       98.01       98.01
          1 |         95        0.95       98.96
          2 |         37        0.37       99.33
          3 |         22        0.22       99.55
          4 |         11        0.11       99.66
          5 |         14        0.14       99.80
          6 |          5        0.05       99.85
          8 |          3        0.03       99.88
          9 |          3        0.03       99.91
         10 |          3        0.03       99.94
         11 |          2        0.02       99.96
         13 |          2        0.02       99.98
         20 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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