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_10138926_1 (_number VARCHAR)
### Question:
How many 2001 censuses are there on number 13?
### Answer:
SELECT COUNT(2001 AS _census) FROM table_10138926_1 WHERE _number = 13