Well you may consider this article to be somewhat helpful:

http://en.wikipedia.org/wiki/Canadian_humour

As for 70's to 80's era provender: you may recognize SCTV to basically be Canada's version of Not The 9 O'Clock News.

Much of Canada's humor seemingly stems from the realization that we, as a nation, do not have as much of presence on the global stage as do our older or bigger cousins. Much of our humor might be summed up by imagining a room full of focused individuals discussing items of importance while some character in the far back corner waves towards the cameras and makes the odd inside joke appreciated only by the locals of his hometown who might be watching the proceedings live. The Canadian comic, obviously, is that recessed individual and the rest of the country his hometown.

While we recognize that we exaggerate our seeming lack of importance for comedic effect, it is also juxtaposed against a reality that we were one of the few colonies that did not rebel against British rule, but were, in fact, encouraged to leave (at which point we might insert an allusion to being finally forced from the familial nest by an exasperated parent). As such, while we have grown up in our own right, we did not largely do so with 'a gun in hand' so we play a bit with this lack of perceived respectability.

We might be considered the self-effacing, shy fellow in class who is often overlooked, rarely engages in aggression, but who nonetheless enjoys a good laugh--even if it might be at his own expense.