CREATE TABLE table_name_90 (total INT, year_of_census VARCHAR, serbs VARCHAR)

What is the average total of the census after 1971 with 10,412 (32.88%) Serbs?
SELECT AVG(total) FROM table_name_90 WHERE year_of_census > 1971 AND serbs = "10,412 (32.88%)"
SELECT AVG("total") FROM "table_name_90" WHERE "10,412 (32.88%)" = "serbs" AND "year_of_census" > 1971