Frequencies for first 10,000 rows of shck_trma_srvc_cd variable in pos1992 dataset :

 srv: shock |
     trauma |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,851       88.51       88.51
          0 |      1,029       10.29       98.80
          1 |         94        0.94       99.74
          2 |         20        0.20       99.94
          3 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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