Method & caveats. Seriously considered attempting suicide during the past year. National Total estimates, all high school students, rounded to whole percentages by the publisher. Biennial cadence is expected, not a gap; named exception to annual coverage expectations. Six survey readings from 2013 through 2023 are the full Total trend rows published in this PDF; no earlier years are inferred and no intervening years are interpolated. The checked-in publisher PDF is verified against data/cdc/READ.md before parsing. Breaks: biennial; 2021 fielded in fall 2021.
Sources
Every value on this page is read from the publisher below. Current and historical source documents: