Hello. Welcome.
I'm going with all modern.
Some Asian. And probably also some Mexican. The most well known Mexican manufacturer is Vacor, also known as Glasfirma. They have been marketed under the name Mega at least in the U.S. I have a Canadian package with Vacors distributed under the Montrose brand.
I don't know the names of any of the Asian companies which made those types. Maybe someone does, but I think the Asian marbles tend to come to North America without much branding.
Edit: Oh duh, many of the Asian marbles were distributed by the Imperial Toy Co. That's why you will often hear modern Asian marbles being called Imperials.