Frequencies for first 10,000 rows of prov1360 variable in pos1991 dataset :

 tech super |
          - |
pathologist |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,095       90.95       90.95
          1 |        541        5.41       96.36
          2 |        167        1.67       98.03
          3 |         85        0.85       98.88
          4 |         42        0.42       99.30
          5 |         26        0.26       99.56
          6 |         15        0.15       99.71
          7 |          9        0.09       99.80
          8 |          5        0.05       99.85
          9 |         10        0.10       99.95
         10 |          3        0.03       99.98
         11 |          1        0.01       99.99
         13 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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