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_18 (year_made VARCHAR, wheel_arrangement VARCHAR)
### Question:
What is the sum number of years where the wheel arrangement of 0-4-0t?
### Answer:
SELECT COUNT(year_made) FROM table_name_18 WHERE wheel_arrangement = "0-4-0t"