Frequencies for first 10,000 rows of person variable in nhamcsed1995 dataset :

           person who caused the injury |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
Not applicable (not a violence-related  |      9,757       97.57       97.57
                                 Spouse |          8        0.08       97.65
                 Other intimate partner |         14        0.14       97.79
                                 Parent |          6        0.06       97.85
                           Other family |          9        0.09       97.94
                    Friend/acquaintance |         28        0.28       98.22
                               Stranger |         37        0.37       98.59
                                Unknown |        120        1.20       99.79
                                  Other |         21        0.21      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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