CREATE TABLE table_33457 ("Year" FLOAT, "Drivers" CLOB, "Wins" FLOAT, "Points" CLOB, "D.C." CLOB)

Before 2007, how many wins were there when the point total was 48?
SELECT SUM("Wins") FROM table_33457 WHERE "Points" = '48' AND "Year" < '2007'
SELECT SUM("Wins") FROM "table_33457" WHERE "Points" = '48' AND "Year" < '2007'