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_21481509_4 (COUnT VARCHAR, r1b1a2__r_m269_ VARCHAR)
### Question:
How many n are listed for 0.6% r1b1a2 (r-m269)?
### Answer:
SELECT COUnT AS n FROM table_21481509_4 WHERE r1b1a2__r_m269_ = "0.6%"