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

What was the year when West Manila has a tariff increase of 6.5?
SELECT "Year" FROM table_21480 WHERE "West Manila" = '6.5'
SELECT "Year" FROM "table_21480" WHERE "West Manila" = '6.5'