Will Nation's Center of Population Stay in Missouri for Fifth Decade?
...population shifts every decade. The colonial town of Chestertown, Maryland, near the Chesapeake...the center was near Plato, a small town about 75 miles northeast of Springfield
https://www.census.gov/library/stories/2021/11/will-nations-center-of-population-stay-in-missouri-for-fifth-decade.html
Understanding and Using Puerto Rico Community Survey Data: What All Data Users Need to Know
...or mobile home occupies. Whereas the acre is the unit of measurement in the ACS...the cuerda (or “Spanish acre,” equal to .971 acres) is the measurement unit
https://www.census.gov/content/dam/Census/library/publications/2020/acs/acs_prcs_handbook_2020.pdf