Frequencies for first 10,000 rows of prov2235 variable in pos2009 dataset :

       SRV: |
   NEONATAL |
    NURSERY |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,638       86.38       86.38
          0 |        932        9.32       95.70
          1 |        374        3.74       99.44
          2 |         38        0.38       99.82
          3 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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