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

   Services |
  Provided: |
 Optometric |
Description |      Freq.     Percent        Cum.
------------+-----------------------------------
            |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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