CREATE TABLE table_53637 ("City" TEXT, "1970" FLOAT, "1980" FLOAT, "1990" FLOAT, "2000" FLOAT, "2010 est." FLOAT)

With 1990 growth greater than 19,988 and 1970 growth less than 10,522, what is the 1980 average?
SELECT AVG("1980") FROM table_53637 WHERE "1990" > '19,988' AND "1970" < '10,522'
SELECT AVG("1980") FROM "table_53637" WHERE "1970" < '10,522' AND "1990" > '19,988'