Frequencies for first 10,000 rows of prov2950 variable in pos1992 dataset :

interpretin |
          g |
physicians- |
     direct |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,977       99.77       99.77
         .1 |          1        0.01       99.78
        .25 |          1        0.01       99.79
         .4 |          1        0.01       99.80
          1 |          9        0.09       99.89
          2 |          2        0.02       99.91
          3 |          1        0.01       99.92
          4 |          3        0.03       99.95
          5 |          1        0.01       99.96
          6 |          2        0.02       99.98
          8 |          1        0.01       99.99
         19 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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