Frequencies for first 10,000 rows of injdet variable in namcs2011 dataset :

                    Is visit related to |
       injury/poisoning/adverse effect? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
         Unintentional injury/poisoning |        507        5.07        5.07
           Intentional injury/poisoning |          6        0.06        5.13
      Injury/poisoning - unknown intent |        280        2.80        7.93
Adv effect of med/surg care/medicinal d |         82        0.82        8.75
                      None of the above |      9,125       91.25      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016