Frequencies for first 10,000 rows of chrprctic_srvc_cd variable in pos1996 dataset :

       srv: |
chiropracti |
          c |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,803       88.03       88.03
          0 |      1,162       11.62       99.65
          1 |         13        0.13       99.78
          2 |         19        0.19       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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