Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_78 (tonnage INTEGER, date VARCHAR)
### Question:
What was the tonnage on 30 march 1943?
### Answer:
SELECT AVG(tonnage) FROM table_name_78 WHERE date = "30 march 1943"