Frequencies for first 10,000 rows of prov1500 variable in pos1999 dataset :

 physicians |
- volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,918       99.18       99.18
        .01 |          1        0.01       99.19
        .02 |          1        0.01       99.20
        .05 |          2        0.02       99.22
         .1 |          1        0.01       99.23
         .2 |          2        0.02       99.25
        .25 |         28        0.28       99.53
         .3 |          1        0.01       99.54
         .5 |          2        0.02       99.56
        .75 |          1        0.01       99.57
          1 |         29        0.29       99.86
          2 |          7        0.07       99.93
          3 |          1        0.01       99.94
          5 |          1        0.01       99.95
       5.75 |          1        0.01       99.96
          7 |          1        0.01       99.97
         10 |          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