Frequencies for first 10,000 rows of prov1500 variable in pos2001 dataset :

 physicians |
- volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,914       99.14       99.14
        .01 |          1        0.01       99.15
        .02 |          2        0.02       99.17
        .05 |          3        0.03       99.20
         .1 |          1        0.01       99.21
         .2 |          2        0.02       99.23
        .25 |         21        0.21       99.44
         .3 |          2        0.02       99.46
         .5 |          2        0.02       99.48
        .75 |          1        0.01       99.49
          1 |         35        0.35       99.84
          2 |          8        0.08       99.92
          3 |          1        0.01       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
         20 |          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