CREATE TABLE table_15185 ("Year" FLOAT, "Population  ( Total ) " FLOAT, " ( Barcaldine ) " FLOAT, " ( Aramac ) " FLOAT, " ( Jericho ) " FLOAT)

What year was the (Barcaldine) larger than 1,868 and the (Aramac) lower than 1,592?
SELECT AVG("Year") FROM table_15185 WHERE "(Barcaldine)" > '1,868' AND "(Aramac)" < '1,592'
SELECT AVG("Year") FROM "table_15185" WHERE "(Aramac)" < '1,592' AND "(Barcaldine)" > '1,868'