Frequencies for first 10,000 rows of prov1500 variable in pos1992 dataset :

 physicians |
- volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,937       99.37       99.37
         .1 |          1        0.01       99.38
         .2 |          2        0.02       99.40
        .25 |         27        0.27       99.67
         .5 |          4        0.04       99.71
          1 |         23        0.23       99.94
          2 |          2        0.02       99.96
          4 |          1        0.01       99.97
          5 |          1        0.01       99.98
       6.75 |          1        0.01       99.99
         25 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016