Frequencies for first 10,000 rows of injdet variable in nhamcsopd2006 dataset :

                    is visit related to |
       injury/poisoning/adverse effect? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
         Unintentional injury/poisoning |        616        6.16        6.16
           Intentional injury/poisoning |         25        0.25        6.41
Adverse effect of med care/surg care/me |        155        1.55        7.96
                      None of the above |      8,263       82.63       90.59
                                Unknown |        877        8.77       99.36
                                  Blank |         64        0.64      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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