What broadcast dates have a weekly rank of 73?
CREATE TABLE table_16072430_1 (
    air_date VARCHAR,
    weekly_rank VARCHAR
)
SELECT COUNT(air_date) FROM table_16072430_1 WHERE weekly_rank = "73"
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: What broadcast dates have a weekly rank of 73? ### Input: CREATE TABLE table_16072430_1 (
    air_date VARCHAR,
    weekly_rank VARCHAR
) ### Response: SELECT COUNT(air_date) FROM table_16072430_1 WHERE weekly_rank = "73"