@Rollopoloboy
Maybe most but not the ones that existed before that happened that still exist today
Probably more than 80% of them if you believe in the pareto principle
"The Pareto principle (also known as the 80/20 rule, the law of the vital few and the principle of factor sparsity[1][2]) states that for many outcomes, roughly 80% of consequences come from 20% of causes (the "vital few").[1]"
https://en.wikipedia.org/wiki/Pareto_principle