Frequencies for first 10,000 rows of injpoisad variable in namcs2014 dataset :

                    Is visit related to |
  injury/poisoning/adverse effect? 2012 |
                                 format |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                  Blank |         38        0.38        0.38
                                Unknown |        383        3.83        4.21
                     Yes, injury/trauma |      1,083       10.83       15.04
                         Yes, poisoning |         16        0.16       15.20
Yes, adverse effect of medical treatmen |        132        1.32       16.52
                                    No' |      8,322       83.22       99.74
             Questionable injury status |         26        0.26      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017