CREATE TABLE table_6525 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" FLOAT)

What is the highest attendance for the game before week 13 on December 9, 1973?
SELECT MAX("Attendance") FROM table_6525 WHERE "Date" = 'december 9, 1973' AND "Week" < '13'
SELECT MAX("Attendance") FROM "table_6525" WHERE "Date" = 'december 9, 1973' AND "Week" < '13'