Frequencies for first 10,000 rows of prov2365 variable in pos1991 dataset :

       srv: |
   pharmacy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,270       42.70       42.70
          0 |      1,167       11.67       54.37
          1 |      1,973       19.73       74.10
          2 |        756        7.56       81.66
          3 |        140        1.40       83.06
          4 |         83        0.83       83.89
          5 |      1,418       14.18       98.07
          6 |         10        0.10       98.17
          7 |        183        1.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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