Frequencies for first 10,000 rows of prov2360 variable in pos1998 dataset :

       srv: |
  pediatric |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,805       88.05       88.05
          0 |        561        5.61       93.66
          1 |        586        5.86       99.52
          2 |         36        0.36       99.88
          3 |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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