CREATE TABLE table_21994 ("Spaceport" TEXT, "Launch complex" TEXT, "Launcher" TEXT, "Spacecraft" TEXT, "Flights" TEXT, "Years" TEXT)

What years had 134 orbital flights?
SELECT "Years" FROM table_21994 WHERE "Flights" = '134 Orbital'
SELECT "Years" FROM "table_21994" WHERE "Flights" = '134 Orbital'