Frequencies for first 10,000 rows of prov2360 variable in pos1996 dataset :

       srv: |
  pediatric |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,803       88.03       88.03
          0 |        567        5.67       93.70
          1 |        581        5.81       99.51
          2 |         38        0.38       99.89
          3 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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