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_name_31 (capacity_in_use VARCHAR, annual_change VARCHAR)

### Question ###
What is the Capacity in use with an Annual change that is 21.8%?

### Accurate SQL ###

SELECT capacity_in_use FROM table_name_31 WHERE annual_change = "21.8%"