American Indians on the Nez Perce Reservation: Age Compare to others Ranking of Idaho reservations Download data Download data for all Idaho reservations These data come from the U.S. Census Bureau's American Community Survey, data.census.gov. They are based on averages of data collected in 2017, 2018, 2019, 2020, and 2021. These estimates cannot be used to say what is going on in any particular year in the period, only what the average value is over the full period. Some reservations have no data reported due to their small populations.   Among American Indians on Nez Perce Reservation in 2017-2021. . . 31.9 percent were under 18. 57.6 percent were 18 to 64 years old. 10.5 percent were 65 or older. Please note that ORTL stands for Off-Reservation Trust Land.   Note: These ACS data are estimates based on a five-year average, meaning that data gathered from 2017, 2018, 2019, 2020, and 2021 are averaged together to come up with the results shown here. There is no problem with comparing these data to census data from 2000. For a technical discussion of the "margins of error" associated with ACS estimates, please see: (https://www.census.gov/programs-surveys/acs/guidance/training-presentations/acs-moe.html) NA = Not Available. The Census Bureau does not report data for all reservations for all reference years. Data presented here pertain only to people who identified themselves on the census questionnaire as American Indian or Alaska Native (AIAN). 2000 data pertain only to people who identified themselves as one race only, that is, as AIAN. See (http://www.census.gov/prod/2002pubs/c2kbr01-15.pdf) for information about AIAN data in the 2000 census. Source: 2006-2021: U.S. Bureau of the Census, American Community Survey, (https://data.census.gov/cedsci/advanced);