CREATE TABLE table_8170 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Ground" TEXT, "Date" TEXT, "Crowd" FLOAT)

What was the total crowd attendance at Westpac Stadium?
SELECT SUM("Crowd") FROM table_8170 WHERE "Ground" = 'westpac stadium'
SELECT SUM("Crowd") FROM "table_8170" WHERE "Ground" = 'westpac stadium'