If you were born after 1968, you’ve never seen a third-party presidential candidate receive a single electoral vote.
Even in 2016’s “lesser-of-two-evils” contest, third-party candidates combined to earn roughly five percent of the vote, the same number Ross Perot achieved on his own in 1992.
Our system is becoming increasingly stratified. Presidential election numbers make good illustrations, but they don’t define our political system.