Frequencies for first 10,000 rows of shck_trma_srvc_cd variable in pos2011 dataset :

   Services |
  Provided: |
     Trauma |
     Center |
(Designated |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,614       86.14       86.14
          0 |      1,269       12.69       98.83
          1 |         82        0.82       99.65
          2 |         22        0.22       99.87
          3 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Apr 2019