Why are there more 70s and 80s chevy trucks than fords around today?

I'm not trying to say ones better just a question did chevy make more than ford or something? I see alot of old chevys driving around my area and some fords but i never see dodges at all maybe one or two every once in a wile

I think you're right especially where I live Chevys were more popular here during the late 70s to 80s as for dodge they kind of hit a bad spot in the 80s they didn't make the best reliable cars of the decade.