Frequencies for first 10,000 rows of neontl_icu_srvc_cd variable in pos2008 dataset :

 srv: icu - |
   neonatal |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,655       86.55       86.55
          0 |      1,309       13.09       99.64
          1 |         30        0.30       99.94
          2 |          2        0.02       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017