Frequencies for first 10,000 rows of prov2235 variable in pos1998 dataset :

       srv: |
   neonatal |
    nursery |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,805       88.05       88.05
          0 |        765        7.65       95.70
          1 |        386        3.86       99.56
          2 |         35        0.35       99.91
          3 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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