Frequencies for first 10,000 rows of physn_vlntr_cnt variable in pos2005 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 |          1        0.01       99.22
        .25 |         19        0.19       99.41
         .3 |          2        0.02       99.43
         .5 |          3        0.03       99.46
        .75 |          1        0.01       99.47
          1 |         40        0.40       99.87
          2 |          7        0.07       99.94
          3 |          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 , 17 May 2017