Frequencies for first 10,000 rows of prov2235 variable in pos1995 dataset :

       srv: |
   neonatal |
    nursery |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,933       89.33       89.33
          0 |        688        6.88       96.21
          1 |        340        3.40       99.61
          2 |         31        0.31       99.92
          3 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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