Frequencies for first 10,000 rows of prov2295 variable in pos1995 dataset :

       srv: |
 optometric |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,933       89.33       89.33
          0 |        931        9.31       98.64
          1 |         68        0.68       99.32
          2 |         62        0.62       99.94
          3 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016