Table schema:
CREATE TABLE table_name_71 (state_s_ VARCHAR, percent_change__1990_2000_ VARCHAR)

Question: What is the 2000 population in OK with a 1990-2000 percent change of A078 +17.22%?
SQL: SELECT 2000 AS _population FROM table_name_71 WHERE state_s_ = "ok" AND percent_change__1990_2000_ = "a078 +17.22%"