SELECT COUNT("Crowd") FROM table_54672 WHERE "Away team" = 'carlton'
How large was the crowd when Carlton was the away team?
CREATE TABLE table_54672 (
    "Home team" text,
    "Home team score" text,
    "Away team" text,
    "Away team score" text,
    "Venue" text,
    "Crowd" real,
    "Date" text
)