What was the year when West Manila has a tariff increase of 6.5?
CREATE TABLE table_17302440_1 (year VARCHAR, west_manila VARCHAR)
SELECT year FROM table_17302440_1 WHERE west_manila = "6.5"
### Context: CREATE TABLE table_17302440_1 (year VARCHAR, west_manila VARCHAR) ### Question: What was the year when West Manila has a tariff increase of 6.5? ### Answer: SELECT year FROM table_17302440_1 WHERE west_manila = "6.5"