CREATE TABLE table_1969 ("Year" FLOAT, "Formula" TEXT, "Driver" TEXT, "Constructor" TEXT, "Location" TEXT, "Report" TEXT)

What is the total number of drivers who have cars constructed by Mercedes-Benz?
SELECT COUNT("Driver") FROM table_1969 WHERE "Constructor" = 'Mercedes-Benz'
SELECT COUNT("Driver") FROM "table_1969" WHERE "Constructor" = 'Mercedes-Benz'