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

 SRV: ICU - |
   SURGICAL |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,638       86.38       86.38
          0 |      1,248       12.48       98.86
          1 |         99        0.99       99.85
          2 |          7        0.07       99.92
          3 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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