The percentage of sociopaths hasn't changed much as far as a percentage. However the percentage of sociopaths that have reached positions within corporations has increased disproportionately to their overall percentage in the population. This I believe that corporations themselves are sociopathic in nature and reward those with no feelings and no guilt.
Well for a minute I thought I was crazy because it seems that they are everywhere, but since you confirmed it maybe I'm not so crazy after all, jk.
Seriously though, I do think it is a growing problem and that it can only be solved if everyone were to take a conscious note of the behaviors associated with sociopathy so that they can ensure that their behavior does not fall within the sociopathy limits.
Frankly I don't know who is the bigger problem sociopaths are those who are trying to fix them such as to psychologists. An individual caught after horrendously, brutally, torturing strangers they happen to encounter the psychologists would empathize with these murderous killers-("I feel your pain after having your teddy bear snatched from you as a child.") These sociopaths begins to receive all the attention while their victims are all but forgotten.
I have seen a number of prison documentaries and when the interviewer addressed these psychotics, sociopaths they are not looking to be cured, a wolf cannot be turned into a sheep. The idea that we can fix anything and everyone is ridiculous as it would seem because of our arrogance the public is at risk.