Grade Inflation in U.S. High Schools, 1966-2022, “American Freshman Survey” from the Higher Education Research Institute at UCLA (1966-2019, 2022, and 2023 data — the 2022 and 2023 data have not been normed and weighted as were prior years, but those years are listed to indicate the data’s continued trend rather than the precision of the percentages.)U.S. Average ACT Scores (1990-2020, 2021, 2022, and 2023 data)