CREATE TABLE table_12505 ("Player" TEXT, "Country" TEXT, "Year ( s )  won" TEXT, "Total" FLOAT, "To par" TEXT, "Finish" TEXT)

What total average has 1988 has the year (s) won?
SELECT AVG("Total") FROM table_12505 WHERE "Year(s) won" = '1988'
SELECT AVG("Total") FROM "table_12505" WHERE "Year(s) won" = '1988'