Canadian football is also played at the high school, junior, collegiate, and semi-professional levels: the Canadian Junior Football League, formed May 8, 1974, and Quebec Junior Football League are leagues for players aged 18–22, many post-secondary institutions compete in Canadian Interuniversity Sport for the Vanier Cup, and senior leagues such as the Alberta Football League have grown in popularity in recent years. Players and what leaguer 18 to 24?