Frequencies for first 10,000 rows of prov2475 variable in pos1999 dataset :

 srv: shock |
     trauma |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,885       88.85       88.85
          0 |      1,025       10.25       99.10
          1 |         64        0.64       99.74
          2 |         17        0.17       99.91
          3 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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