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_name_49 (crude_birth_rate__per_1000_ INTEGER, natural_change VARCHAR)
### Question:
Natural change of 42 689 has which lowest Crude birth rate (per 1000)?
### Answer:
SELECT MIN(crude_birth_rate__per_1000_) FROM table_name_49 WHERE natural_change = "42 689"