CREATE TABLE table_14475 ("Year" FLOAT, "Entrant" CLOB, "Chassis" CLOB, "Engine" CLOB, "Points" CLOB)

What year was the cosworth ca2006 2.4 v8 4 series used?
SELECT AVG("Year") FROM table_14475 WHERE "Engine" = 'cosworth ca2006 2.4 v8 4 series'
SELECT AVG("Year") FROM "table_14475" WHERE "Engine" = 'cosworth ca2006 2.4 v8 4 series'