Frequencies for first 10,000 rows of prov2235 variable in pos1993 dataset :

       srv: |
   neonatal |
    nursery |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,856       88.56       88.56
          0 |        729        7.29       95.85
          1 |        372        3.72       99.57
          2 |         32        0.32       99.89
          3 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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