Frequencies for first 10,000 rows of chrprctic_srvc_cd variable in pos2000 dataset :

       srv: |
chiropracti |
          c |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,871       88.71       88.71
          0 |      1,092       10.92       99.63
          1 |         15        0.15       99.78
          2 |         18        0.18       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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