Frequencies for first 10,000 rows of prov2235 variable in pos2004 dataset :

       srv: |
   neonatal |
    nursery |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,766       87.66       87.66
          0 |        827        8.27       95.93
          1 |        355        3.55       99.48
          2 |         39        0.39       99.87
          3 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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