This indicator breaks down school enrollment in each grade level by type of school, private or public, for the population 3 years and over enrolled in school. Percentage refers to the proportion of those 3+ enrolled in school in either private or public school in the given grade level. Therefore, the sum of private and public percentages for each grade level will add to 100%.
Source: U.S. Census Bureau; 2013-2017 American Community Survey 5-Year Estimates, Table B14002.