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_21481509_4 (COUnT VARCHAR, r1b1a2__r_m269_ VARCHAR)

### Question ###
How many n are listed for 0.6% r1b1a2 (r-m269)?

### Accurate SQL ###

SELECT COUnT AS n FROM table_21481509_4 WHERE r1b1a2__r_m269_ = "0.6%"