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

 SRV: ICU - |
   NEONATAL |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,638       86.38       86.38
          0 |      1,308       13.08       99.46
          1 |         40        0.40       99.86
          2 |          7        0.07       99.93
          3 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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