Frequencies for first 10,000 rows of prov2295 variable in pos2006 dataset :

       srv: |
 optometric |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,710       87.10       87.10
          0 |      1,142       11.42       98.52
          1 |         76        0.76       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 , 26 Jan 2016