Frequencies for first 10,000 rows of chrprctic_srvc_cd variable in pos1994 dataset :

       srv: |
chiropracti |
          c |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,940       89.40       89.40
          0 |      1,024       10.24       99.64
          1 |         14        0.14       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