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 university (affiliation VARCHAR, enrollment INTEGER)
### Question:
Find the number of universities that have over a 20000 enrollment size for each affiliation type.
### Answer:
SELECT COUNT(*), affiliation FROM university WHERE enrollment > 20000 GROUP BY affiliation