Frequencies for first 10,000 rows of prov1500 variable in pos1996 dataset :

 physicians |
- volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,901       99.01       99.01
        .01 |          1        0.01       99.02
        .05 |          2        0.02       99.04
         .1 |          3        0.03       99.07
         .2 |          2        0.02       99.09
        .25 |         40        0.40       99.49
         .3 |          1        0.01       99.50
         .5 |          2        0.02       99.52
        .75 |          1        0.01       99.53
          1 |         34        0.34       99.87
          2 |          8        0.08       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