CREATE TABLE table_4644 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the highest crowd population when the away team is Geelong?
SELECT MAX("Crowd") FROM table_4644 WHERE "Away team" = 'geelong'
SELECT MAX("Crowd") FROM "table_4644" WHERE "Away team" = 'geelong'