Frequencies for first 10,000 rows of neontl_icu_srvc_cd variable in pos2007 dataset :

 srv: icu - |
   neonatal |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,682       86.82       86.82
          0 |      1,296       12.96       99.78
          1 |         20        0.20       99.98
          2 |          1        0.01       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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