Frequencies for first 10,000 rows of prov2235 variable in pos2006 dataset :

       srv: |
   neonatal |
    nursery |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,710       87.10       87.10
          0 |        860        8.60       95.70
          1 |        376        3.76       99.46
          2 |         38        0.38       99.84
          3 |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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