What year was the expansion in the city of San Juan?
CREATE TABLE table_name_31 (year VARCHAR, city VARCHAR)
SELECT COUNT(year) FROM table_name_31 WHERE city = "san juan"
### Context: CREATE TABLE table_name_31 (year VARCHAR, city VARCHAR) ### Question: What year was the expansion in the city of San Juan? ### Answer: SELECT COUNT(year) FROM table_name_31 WHERE city = "san juan"