Frequencies for first 10,000 rows of prov2235 variable in pos2003 dataset :

       srv: |
   neonatal |
    nursery |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,789       87.89       87.89
          0 |        804        8.04       95.93
          1 |        357        3.57       99.50
          2 |         37        0.37       99.87
          3 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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