Frequencies for first 10,000 rows of chrprctic_srvc_cd variable in pos2011 dataset :

   Services |
  Provided: |
Chiropracti |
          c |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,614       86.14       86.14
          0 |      1,340       13.40       99.54
          1 |         20        0.20       99.74
          2 |         23        0.23       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Apr 2019