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 available_policies ( policy_type_code VARCHAR )

### Question ###
Find the policy type used by more than 4 customers.

### Accurate SQL ###

SELECT policy_type_code FROM available_policies GROUP BY policy_type_code HAVING COUNT(*) > 4