Percentage of students at or above selected National Assessment of Educational Progress (NAEP) reading achievement levels, by grade and selected student characteristics: 1998 through 2015. __Connected to SDG indicator 4.1.1 - Proportion of children and young people: (a) in grades 2/3; (b) at the end of primary; and (c) at the end of lower secondary achieving at least a minimum proficiency level in (i) reading and (ii) mathematics, by sex __ Internet Archive URL: https://web.archive.org/web/2017*/https://nces.ed.gov/programs/digest/d15/tables/dt15_221.20.asp?current=yes