CREATE TABLE table_70405 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" FLOAT)

How many years did barclay nordica arrows bmw enter with a bmw str-4 t/c engine with less than 1 point?
SELECT SUM("Year") FROM table_70405 WHERE "Engine" = 'bmw str-4 t/c' AND "Entrant" = 'barclay nordica arrows bmw' AND "Points" < '1'
SELECT SUM("Year") FROM "table_70405" WHERE "Engine" = 'bmw str-4 t/c' AND "Entrant" = 'barclay nordica arrows bmw' AND "Points" < '1'