Frequencies for first 10,000 rows of prov2225 variable in pos1997 dataset :

       srv: |
    medical |
   supplies |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,570       95.70       95.70
          0 |         23        0.23       95.93
          1 |        153        1.53       97.46
          2 |        252        2.52       99.98
          3 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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