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_31 (capacity_in_use VARCHAR, annual_change VARCHAR)
### Question:
What is the Capacity in use with an Annual change that is 21.8%?
### Answer:
SELECT capacity_in_use FROM table_name_31 WHERE annual_change = "21.8%"