Frequencies for first 10,000 rows of prov1500 variable in pos1997 dataset :

 physicians |
- volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,903       99.03       99.03
        .01 |          1        0.01       99.04
        .05 |          2        0.02       99.06
         .1 |          3        0.03       99.09
         .2 |          2        0.02       99.11
        .25 |         41        0.41       99.52
         .3 |          1        0.01       99.53
         .5 |          2        0.02       99.55
        .75 |          1        0.01       99.56
          1 |         29        0.29       99.85
          2 |          9        0.09       99.94
          5 |          1        0.01       99.95
       5.75 |          1        0.01       99.96
          7 |          1        0.01       99.97
      10.75 |          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