According to the U.S.Census Bureau’s figures, West Virginia has grown in population from 1,808,344 in 2000 to 1,852,994 in 2010. This represents a population growth of approximately 2.5% in this time frame. (Of passing interest, please note that the population of the United States as a whole went from 281,421,906 in 2000 to 308,745,538 in 2010, an overall American growth for the decade of 9.7%).
According to Episcopal Church statistics, the Diocese of West Virginia went from Average Sunday Attendance (or ASA) of 3,983 in 2000 to 3,015 in 2010. This represents a decline of 24.3% during this decade. Doing some historical digging, I noticed that the Average Sunday Attendance (or ASA) in 1994 for West Virginia was 4,511.
To see a pictorial representation of some of the statistics for the diocese of West Virginia you may examine the graph here.