Frequencies for first 10,000 rows of prov0845 variable in pos1995 dataset :

        lab |
directors - |
         md |
  specialty |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,860       98.60       98.60
          1 |        111        1.11       99.71
          2 |         23        0.23       99.94
          3 |          4        0.04       99.98
          4 |          1        0.01       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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