Frequencies for first 10,000 rows of prov1500 variable in pos1998 dataset :

 physicians |
- volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,904       99.04       99.04
        .01 |          1        0.01       99.05
        .02 |          1        0.01       99.06
        .05 |          2        0.02       99.08
         .1 |          2        0.02       99.10
         .2 |          2        0.02       99.12
        .25 |         37        0.37       99.49
         .3 |          1        0.01       99.50
         .5 |          2        0.02       99.52
        .75 |          1        0.01       99.53
          1 |         30        0.30       99.83
          2 |         10        0.10       99.93
          5 |          1        0.01       99.94
       5.75 |          1        0.01       99.95
          7 |          1        0.01       99.96
         10 |          1        0.01       99.97
      10.75 |          1        0.01       99.98
         22 |          1        0.01       99.99
         60 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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