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_name_9 ( founded INTEGER, municipality VARCHAR, population__2010_ VARCHAR )

### Question ###
In what year was Yauco, which had over 42,043 people in 2010, founded?

### Accurate SQL ###

SELECT AVG(founded) FROM table_name_9 WHERE municipality = "yauco" AND population__2010_ > 42 OFFSET 043