Frequencies for first 10,000 rows of prov2360 variable in pos1993 dataset :

       srv: |
  pediatric |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,856       88.56       88.56
          0 |        529        5.29       93.85
          1 |        571        5.71       99.56
          2 |         31        0.31       99.87
          3 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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