That's right Felipe and even for the few years I've been around I can tell you that its just gotten more and more violent. Its not going anywhere because America just loves violence. I don't know about other countries but its probably epidemic here.
Not just the US but in other regions and countries as well, what happened to the old days when other business used to make nice movies for people? I like to watch them still but the problem is that it is hard to find them sometimes. This description of this topic above that says:
Violence in PG-13 rated movies not linked to violence in US society. New research suggests that policy makers should remain focused on issues that have been demonstrated to impact criminal behavior, such as family environment, mental health, poverty and education. Source 6c.