Frequencies for first 10,000 rows of prov2100 variable in pos2008 dataset :

       srv: |
chiropracti |
          c |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,655       86.55       86.55
          0 |      1,298       12.98       99.53
          1 |         22        0.22       99.75
          2 |         22        0.22       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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