Frequencies for first 10,000 rows of injury variable in namcs2015 dataset :

   Is visit |
 related to |
injury/pois |
oning/adver |
 se effect? |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |         68        0.68        0.68
         -8 |        384        3.84        4.52
          0 |      8,303       83.03       87.55
          1 |      1,219       12.19       99.74
          2 |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 25 Oct 2017