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_24430894_20 (year VARCHAR, mutya_ng_pilipinas_asia_pacific VARCHAR)
### Question:
List the number of years where ritchie ocampo was the mutya ng pilipinas winner.
### Answer:
SELECT COUNT(year) FROM table_24430894_20 WHERE mutya_ng_pilipinas_asia_pacific = "Ritchie Ocampo"