Frequencies for first 10,000 rows of injury72 variable in namcs2015 dataset :

    Did the |
  injury or |
  poisoning |
      occur |
  within 72 |
hours prior |
to the date |
and time of |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,556       95.56       95.56
         -8 |         29        0.29       95.85
          1 |         57        0.57       96.42
          2 |        332        3.32       99.74
          3 |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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