Right. That's this year. What about the last 20 years of US elections?
Presumably you’re thinking of Florida in 2000, where the margin of victory was 0.0092%, and thus exceptional care in counting was merited. As far as I can recall other national elections have been timely in the last 20 years.
There last election wasn't particularly close and from my understanding the mathematics of someone other than Trudeau + Liberal party winning were pretty much set.