Frequencies for first 10,000 rows of intentr variable in nhamcsopd2003 dataset :

   intentionality of injury based on |
                              e-code |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
not applicable (not an injury visit) |      9,059       90.59       90.59
                       unintentional |        555        5.55       96.14
                             assault |         29        0.29       96.43
                      unknown intent |          5        0.05       96.48
              adverse medical effect |        102        1.02       97.50
                         blank cause |        250        2.50      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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