Frequencies for first 10,000 rows of prov2705 variable in pos1994 dataset :

      staff |
   assisted |
   dialysis |
       cert |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,545       95.45       95.45
          A |        346        3.46       98.91
          B |        105        1.05       99.96
          E |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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