CREATE TABLE table_11473 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

When North Melbourne is the Away team, what is the total number of the Crowd?
SELECT COUNT("Crowd") FROM table_11473 WHERE "Away team" = 'north melbourne'
SELECT COUNT("Crowd") FROM "table_11473" WHERE "Away team" = 'north melbourne'