Frequencies for first 10,000 rows of prov1500 variable in pos2006 dataset :

 physicians |
- volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,910       99.10       99.10
        .01 |          1        0.01       99.11
        .02 |          2        0.02       99.13
        .05 |          2        0.02       99.15
         .1 |          1        0.01       99.16
         .2 |          1        0.01       99.17
        .25 |         19        0.19       99.36
         .3 |          2        0.02       99.38
         .5 |          3        0.03       99.41
        .75 |          1        0.01       99.42
          1 |         45        0.45       99.87
          2 |          7        0.07       99.94
          4 |          1        0.01       99.95
          5 |          1        0.01       99.96
          7 |          1        0.01       99.97
         20 |          1        0.01       99.98
         24 |          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