Frequencies for first 10,000 rows of cause33d variable in nhamcsed2005 dataset :

             cause of injury #3 - broad |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                   not applicable/blank |      9,955       99.55       99.55
                         drug use/abuse |          4        0.04       99.59
                      alcohol use/abuse |          7        0.07       99.66
                    place of occurrence |         22        0.22       99.88
accidental poisoning by analgesics/an.. |          1        0.01       99.89
acc poison by agricul/horticul chem/p.. |          1        0.01       99.90
surg operatn/oth surg procs as caus o.. |          1        0.01       99.91
             other and unspecified fall |          2        0.02       99.93
    accident caused by unspecified fire |          1        0.01       99.94
foreign body accidentally entering ey.. |          1        0.01       99.95
     hormones and synthetic substitutes |          1        0.01       99.96
other and unspecified drugs and medic.. |          1        0.01       99.97
suicide and self-inflicted poisoning .. |          2        0.02       99.99
 assault by other and unspecified means |          1        0.01      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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