Since 1986, Intercultural Development Research Association (IDRA) has conducted an annual attrition study to track the number and percent of students in Texas who are lost from public secondary school enrollment prior to graduation. The study builds on the series of studies that began when IDRA conducted the first comprehensive study of school dropouts in Texas with the release of the initial study in October 1986. That study was the state's first major effort to assess the school holding power of Texas public schools and resulted in state-level policy reforms for the state education agency to count and report dropout data. IDRA is the only organization that has examined Texas attrition rates consistently, with the same methodology, since 1986. The annual attrition studies released by IDRA include county-level data by race and ethnicity. Trend graphs of high school attrition in each Texas county are available online. The study includes detailed findings, a supplemental analysis for reaching a rate of zero, and graphics showing different types of dropout data. IDRA's study also looks at the latest dropout study released by the Texas Education Agency and the National Center for Education Statistics. This report presents results of long-term trend assessments of attrition data in Texas public high schools. The following assessments and features are included in this report: (1) Texas High School Attrition Rates Stall (Roy L. Johnson); (2) Highest School Attrition Rates are in Regions with the Most Students (Roy L. Johnson); (3) Elusive Zero Attrition Rate is at Least 20 Years Away (Felix Montes); (4) Texas Education Agency Reports No Change in Annual Dropout Rate (Roy L. Johnson); (5) English Language Learners Most Likely to Drop Out of School (Roy L. Johnson); (6) Texas Compares Well with Other States in Federal Dropout Report (Roy L. Johnson); and (7) Types of Dropout Data Defined. [Individual reports contain statistics, charts, and resources. For the 2013-14 report, see ED560200.]