6 decades books

A meteor shower brought Earth superpowers. One in a thousand people gained tier-one powers, which meant powers made you as powerful as a person with a gun. One in the ten thousand people became tier two, which meant you needed 5 swat police armed with submachine guns to deal with that person. One in a hundred thousand became tier three, which made you as strong as a main battle tank. One in a million became tier four and became as strong as an infantry battalion. Earth governments fear the possible appearance of a tier-five superhuman, a person so strong the only option of dealing with him is a nuke.