CREATE TABLE table_15672 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" FLOAT)

What year did Cooper Car Company enter?
SELECT AVG("Year") FROM table_15672 WHERE "Entrant" = 'cooper car company'
SELECT AVG("Year") FROM "table_15672" WHERE "Entrant" = 'cooper car company'