The canadian airdate of 17 march 2008 had how many numbers in the season?
CREATE TABLE table_72141 (
    "No. in season" real,
    "No. in series" real,
    "Title" text,
    "Canadian airdate" text,
    "US airdate" text,
    "Production code" real
)
SELECT COUNT("No. in season") FROM table_72141 WHERE "Canadian airdate" = '17 March 2008'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: The canadian airdate of 17 march 2008 had how many numbers in the season? ### Input: CREATE TABLE table_72141 (
    "No. in season" real,
    "No. in series" real,
    "Title" text,
    "Canadian airdate" text,
    "US airdate" text,
    "Production code" real
) ### Response: SELECT COUNT("No. in season") FROM table_72141 WHERE "Canadian airdate" = '17 March 2008'