Final answer:
The Ponoka Stampede has been an annual event since 1936, and typically, rodeo events like this have an annual Stampede Queen. However, the specific years when a Queen was crowned are not widely documented and would require direct inquiry with the event organizers or research into historical archives.
Step-by-step explanation:
The Ponoka Stampede is one of Canada's largest and oldest rodeos and has been an annual event since 1936. However, information about when the tradition of crowning a Stampede Queen began is specific and may not be widely documented online. The Ponoka Stampede Queen is a representative and ambassador of the event, often participating in community activities and promoting the Stampede throughout her reign.
Without access to the specific records or historical archives of the Ponoka Stampede, providing a list of years when a Queen was crowned is challenging. Typically, though, rodeos and similar events would have an annual selection for such titles, implying that there could have been a Queen for many or most of the years since the introduction of this tradition. To obtain accurate information regarding the years the Ponoka Stampede had a Queen, one might need to contact the event organizers directly or search historical records related to the Stampede.