Figure 9 (Law Enforcement Officers Assaulted and Injured with Firearms or Knives/Other Cutting Instruments, Percent Distribution by Known Offenders Under the Influence at the Time of Incident, 2013): This figure is a pie chart that provides the percent distribution by known offenders who were under the influence of alcohol or a controlled substance(s) at the times of the incidents in 2013. A bar further describing the “under the influence” piece of the pie shows the percentages of those offenders under the influence of alcohol only, a controlled substance(s) only, or both alcohol and a controlled substance(s).