This report from the CDC compares drug, opioid-involved, and heroin-involved overdose mortality rates in Washington state among American Indians and Alaska Natives to those of other racial/ethnic groups during the time period 1999 to 2015.
Joshi, S., Weiser, T., Warren-Mears, V. (2018). Drug, Opioid-Involved, and Heroin-Involved Overdose Deaths Among American Indians and Alaska Natives — Washington, 1999–2015. MMWR Morb Mortal Wkly Rep, 67, 1384–1387.