Frequencies for first 10,000 rows of prov2940 variable in pos1992 dataset :

 consulting |
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 |         17        0.17       99.97
          2 |          1        0.01       99.98
          3 |          1        0.01       99.99
          6 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017