they had no legal right to the land either. They killed and conquered the people who were there even earlier. It's all warfare and bloodshed, back to the earliest days of humanity. Heck, even chimpanzees fight wars for territory.
I am guessing it fell quite a bit in 2015 since the cost of oil extraction is much higher in the U.S. and oil prices fell dramatically.
I grew up around PA Dutch speaking people -- no one ever called the language Pennsylvania German.
Bengal is also a geographical region.