It's quite likely a lot of Americans' data is already being stored and perhaps mined in the Utah Data Center.
https://en.wikipedia.org/wiki/Utah_Data_Center
I would just assume your data could be there unless your computer has never been connected to the Internet. It's simply too easy to hide surveillance in the processor (in the form of remote administration capabilities), the operating system (with remote updates), or the browser, or in the numerous security holes or likely zero-day exploits out there. The state of computer security is an absolute joke, and your 4096-bit RSA key is not keeping your data safe.