Frequencies for first 10,000 rows of chrprctic_srvc_cd variable in pos1992 dataset :

       srv: |
chiropracti |
          c |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,851       88.51       88.51
          0 |      1,116       11.16       99.67
          1 |         13        0.13       99.80
          2 |         15        0.15       99.95
          3 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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