"Annual census" refers to a count or survey that is conducted once every year to gather information about the population in a particular area. Full definition
I provide new evidence on this question based on an analysis of nine years of data from the Common Core of Data, the federal government's annual census of all public schools. (educationnext.org)
In 1987, chief curator Doug Taron of the Peggy Notebaert Nature Museum founded the Illinois Butterfly Monitoring Network, a volunteer - driven organization that conducts annual censuses of butterfly species in the state. (chicagotonight.wttw.com)
Instead, researchers rely on annual censuses conducted using everything from satellites to aerial photographs to ground counts. (sciencemag.org)