CREATE TABLE table_203_777 (id DECIMAL, "years" TEXT, "building" TEXT, "city" TEXT, "height  ( ctbuh ) " TEXT, "floors" DECIMAL)

how many tallest building in canada have been built in toronto ?
SELECT COUNT("years") FROM table_203_777 WHERE "city" = 'toronto'
SELECT COUNT("years") FROM "table_203_777" WHERE "city" = 'toronto'