Why is this data from 2017–2021 instead of just 2021?

After 2000, the Census began collecting a lot of their data through an ongoing survey called the American Community Survey mailed to a small sample of households — instead of through their once–every–ten–year door–to–door survey. Now they pull together five years of American Community Surveys to have a large enough sample in any one neighborhood to provide estimates for that neighborhood. For this reason, data for 2017–2021 describe average conditions reported during the period of January 2017 – December 2021.

How do I write about the 2017–2021 data in a grant report?

Here are some examples of how you can write about this data in a grant report:

“Looking across the five years from 2017 to 2021, the Census Bureau estimates that X% of residents had a high school education or higher…”

“In the five years following 2017, neighborhood statistical area X has experienced a poverty rate of…”

“From 2017 to 2021, X% of residents reported having a commute of X minutes or more to work…”

Source: Understanding and Using American Community Survey Data. U.S. Census Bureau. Retrieved April, 2023 from https://www.census.gov/content/dam/Census/library/publications/2020/acs/acs_researchers_handbook_2020.pdf