CREATE TABLE table_21485 ("Year" FLOAT, "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)

What was West Manila's share of 1996 real tariff when it CPI was 92.9?
SELECT "West Manila as a share of 1996 real tariff" FROM table_21485 WHERE "Consumer Price Index (2005=100)" = '92.9'
SELECT "West Manila as a share of 1996 real tariff" FROM "table_21485" WHERE "Consumer Price Index (2005=100)" = '92.9'