Frequencies for first 10,000 rows of prov0840 variable in pos1991 dataset :

        lab |
directors - |
         md |
pathologist |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,103       91.03       91.03
          1 |        522        5.22       96.25
          2 |        165        1.65       97.90
          3 |         95        0.95       98.85
          4 |         41        0.41       99.26
          5 |         25        0.25       99.51
          6 |         19        0.19       99.70
          7 |          9        0.09       99.79
          8 |          5        0.05       99.84
          9 |         10        0.10       99.94
         10 |          3        0.03       99.97
         11 |          1        0.01       99.98
         13 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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