Frequencies for first 10,000 rows of injdet variable in nhamcsopd2005 dataset :

                    is visit related to |
       injury/poisoning/adverse effect? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
         unintentional injury/poisoning |        685        6.85        6.85
           intentional injury/poisoning |         56        0.56        7.41
adverse effect of med care/surg care/me |        107        1.07        8.48
                      none of the above |      8,035       80.35       88.83
                                unknown |      1,027       10.27       99.10
                                  blank |         90        0.90      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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