Frequencies for first 10,000 rows of physn_vlntr_cnt variable in pos2009 dataset :

 PHYSICIANS |
- VOLUNTEER |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,923       99.23       99.23
        .01 |          1        0.01       99.24
        .02 |          1        0.01       99.25
        .05 |          1        0.01       99.26
         .1 |          1        0.01       99.27
         .2 |          1        0.01       99.28
        .25 |         16        0.16       99.44
         .3 |          1        0.01       99.45
         .5 |          4        0.04       99.49
          1 |         42        0.42       99.91
          2 |          6        0.06       99.97
          4 |          1        0.01       99.98
          7 |          1        0.01       99.99
         24 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017