Most data in this report are estimates based on a sample of the population and are therefore subject to sampling error. Differences between estimates are tested for statistical significance at either the 0.05 or 0.10 cutoff level, according to agency standards; all differences discussed in the report are statistically significant according to the standards of the agency responsible for the data. Agency details about statistical reporting standards for indicators included in the America's Children report and standard error tables for select indicators are available online at https://www.childstats.gov.