What is the total capacity of venues that opened in 1999?
CREATE TABLE table_name_15 (capacity VARCHAR, opened VARCHAR)
SELECT COUNT(capacity) FROM table_name_15 WHERE opened = "1999"
### Context: CREATE TABLE table_name_15 (capacity VARCHAR, opened VARCHAR) ### Question: What is the total capacity of venues that opened in 1999? ### Answer: SELECT COUNT(capacity) FROM table_name_15 WHERE opened = "1999"