Frequencies for first 10,000 rows of prov0845 variable in pos1991 dataset :

        lab |
directors - |
         md |
  specialty |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,799       97.99       97.99
          1 |        156        1.56       99.55
          2 |         37        0.37       99.92
          3 |          1        0.01       99.93
          4 |          2        0.02       99.95
          6 |          3        0.03       99.98
          7 |          1        0.01       99.99
         10 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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