Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_21480 ( "Year" real, "West Manila" text, "East Manila" text, "Consumer Price Index (2005=100)" text, "West Manila as a share of 1996 real tariff" text, "East Manila as a share of 1996 real tariff" text )

### Question ###
What was the year when West Manila has a tariff increase of 6.5?

### Accurate SQL ###

SELECT "Year" FROM table_21480 WHERE "West Manila" = '6.5'