National Counterintelligence Office: Foreign Spies Stealing US Economic Secrets in Cyberspace
This report differs from previous editions in three important ways. The first and most significant is the focus. This report gives special attention to foreign collectors' exploitation of cyberspace, while not excluding other established tactics and methods used in foreign economic collection and industrial espionage. This reflects the fact that nearly all business records, research results, and other sensitive economic or technology-related information now exists primarily in digital form.
Many victims of economic espionage are unaware of the crime until years after loss of the information.
Estimates from academic literature on the losses from economic espionage range so widely at to be meaningless—from $2 billion to $400 billion or more a year—reflecting the scarcity of data and the variety of methods used to collect losses.
Just say "it's a lot of money", and many, if not most, victims don't even know they are being robbed.