Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_10138926_1 ( _number VARCHAR )

### Question ###
How many 2001 censuses are there on number 13?

### Accurate SQL ###

SELECT COUNT(2001 AS _census) FROM table_10138926_1 WHERE _number = 13