Frequencies for first 10,000 rows of physn_vlntr_cnt variable in pos2011 dataset :

 Physicians |
- Volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        589        5.89        5.89
        .01 |          1        0.01        5.90
        .02 |          1        0.01        5.91
        .05 |          1        0.01        5.92
         .1 |          3        0.03        5.95
         .2 |          1        0.01        5.96
        .25 |         11        0.11        6.07
         .3 |          1        0.01        6.08
         .5 |          4        0.04        6.12
          1 |         37        0.37        6.49
          2 |          6        0.06        6.55
          4 |          1        0.01        6.56
          7 |          1        0.01        6.57
         24 |          1        0.01        6.58
          . |      9,342       93.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Apr 2019