CREATE TABLE table_58736 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Pts." TEXT)

What year has 54 (73) points?
SELECT SUM("Year") FROM table_58736 WHERE "Pts." = '54 (73)'
SELECT SUM("Year") FROM "table_58736" WHERE "Pts." = '54 (73)'