What year had a 100m freestyle event?
CREATE TABLE table_name_73 (year_set VARCHAR, event VARCHAR)
SELECT COUNT(year_set) FROM table_name_73 WHERE event = "100m freestyle"
### Context: CREATE TABLE table_name_73 (year_set VARCHAR, event VARCHAR) ### Question: What year had a 100m freestyle event? ### Answer: SELECT COUNT(year_set) FROM table_name_73 WHERE event = "100m freestyle"