This occasional paper presents national demographic subgroup trends for U.S. secondary school students in a series of figures and tables. It supplements two of four annual monographs from the Monitoring the Future (MTF) study, namely the "Overview of Key Findings" and "Volume I: Secondary School Students." MTF is funded by the National Institute on Drug Abuse under a series of investigator-initiated, competitive research grants. The full 2013 survey results are reported in "Monitoring the Future National Survey Results on Drug Use, 1975-2013: Volume I, Secondary School Students." That monograph contains a description of MTF's design and purposes, as well as extended reporting on substance use of all kinds, licit and illicit, and a number of related factors such as attitudes and beliefs about drugs, age of initiation, non-continuation of drug use, perceived availability, relevant conditions in the social environment, history of daily marijuana use, use of drugs for the treatment of ADHD, and sources of prescription drugs used outside of medical supervision. Until 2012, "Volume I" contained the tabular data on trends in drug use for various demographic subgroups that are now presented in the present occasional paper. The trends offered here in tabular form and graphic form--the latter for ease of comprehension--cover demographic subgroups based on: (1) gender; (2) college plans; (3) region of the country; (4) population density; (5) education level of the parents (a proxy for socioeconomic level); and (6) racial/ethnic identification. Detailed descriptions of the demographic categories are provided in a separate chapter. The graphs and tables in this occasional paper present trend data for 8th-, 10th-, and 12th-grade respondents. Data for 12th grade begins with 1975, the first year in which a nationally representative sample of high school seniors was surveyed. Data for 8th and 10th grades begin with 1991, when the study's annual surveys were expanded to include those grade levels. [For "Monitoring the Future National Survey Results on Drug Use, 1975-2013. Volume 1, Secondary School Students," see ED578546. For "Monitoring the Future National Survey Results on Drug Use, 1975-2013: Overview, Key Findings on Adolescent Drug Use," see ED578545.]