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

 srv: icu - |
   surgical |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,682       86.82       86.82
          0 |      1,266       12.66       99.48
          1 |         48        0.48       99.96
          2 |          3        0.03       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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