Frequencies for first 10,000 rows of optmtrc_srvc_cd variable in pos2005 dataset :

       srv: |
 optometric |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,731       87.31       87.31
          0 |      1,123       11.23       98.54
          1 |         74        0.74       99.28
          2 |         62        0.62       99.90
          3 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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