Usually the countries that hold the Olympics issue more than one set of stamps on the subject. Between 1973 and 1976 Canada released 12 sets of stamps. I only have some of them, and not all complete.
The set of ten( I only have seven stamps so far) depicts the Decathlon and ten Olympic Gold medalists at this discipline. The ten events are: 100 meters, Long jump, Shot Put, High Jump, 400 meters, 110 meters hurdles, Pole Vault, Discus, Javelin, 1500 meters.