Frequencies for first 10,000 rows of prov2475 variable in pos2001 dataset :

 srv: shock |
     trauma |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,837       88.37       88.37
          0 |      1,066       10.66       99.03
          1 |         68        0.68       99.71
          2 |         19        0.19       99.90
          3 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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