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_21636599_1 (insurgents VARCHAR, period VARCHAR)
### Question:
How many insurgents have 2003 as a period?
### Answer:
SELECT COUNT(insurgents) FROM table_21636599_1 WHERE period = "2003"