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

srv: trauma |
     center |
(certified) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,655       86.55       86.55
          0 |      1,242       12.42       98.97
          1 |         69        0.69       99.66
          2 |         23        0.23       99.89
          3 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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