CREATE TABLE table_39458 ("Year" FLOAT, "Class" TEXT, "Team" TEXT, "Machine" TEXT, "Points" FLOAT, "Rank" TEXT, "Wins" FLOAT)

How many years have 78 for points?
SELECT COUNT("Year") FROM table_39458 WHERE "Points" = '78'
SELECT COUNT("Year") FROM "table_39458" WHERE "Points" = '78'