CREATE TABLE table_22061 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Game site" TEXT, "Record" TEXT, "Attendance" FLOAT)

How many were in attendance when the game was held in Arrowhead Stadium?
SELECT MIN("Attendance") FROM table_22061 WHERE "Game site" = 'Arrowhead Stadium'
SELECT MIN("Attendance") FROM "table_22061" WHERE "Game site" = 'Arrowhead Stadium'