Frequencies for first 10,000 rows of prov2475 variable in pos2002 dataset :

 srv: shock |
     trauma |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,812       88.12       88.12
          0 |      1,090       10.90       99.02
          1 |         67        0.67       99.69
          2 |         21        0.21       99.90
          3 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016