CREATE TABLE table_79958 ("Year built" TEXT, "Builder" TEXT, "Model" TEXT, "Fleet ID" TEXT, "Seats" FLOAT)

In what year was the ctc-3 model built?
SELECT "Year built" FROM table_79958 WHERE "Model" = 'ctc-3'
SELECT "Year built" FROM "table_79958" WHERE "Model" = 'ctc-3'