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_25200461_9 (population INTEGER, registered_voters VARCHAR)
### Question:
If the registered voters is 66.8%, what is the minimum population?
### Answer:
SELECT MIN(population) FROM table_25200461_9 WHERE registered_voters = "66.8%"