Frequencies for first 10,000 rows of prov2235 variable in pos1997 dataset :

       srv: |
   neonatal |
    nursery |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,792       87.92       87.92
          0 |        779        7.79       95.71
          1 |        387        3.87       99.58
          2 |         34        0.34       99.92
          3 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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