After Snowden’s surveillance revelations, TOR users from US has grown by more than 75 percent

After Snowden’s revelations about National Security Agency that they SPY on every internet user in United States, just after that People from US were under fear of being spied and finding out some ways to by pass NSA Spying.
TOR is one of the way that users using and the number of  TOR users doubled from June of this year.

What is Tor?

Tor is free software and an open network that helps you defend against a form of network surveillance that threatens personal freedom and privacy, confidential business activities and relationships, and state security known as traffic analysis

TOR metrics show out the number of users and you can see the graph below in which it is showed up how TOR users increasing day by day, In the U.S., the number of users has grown by more than 75 percent.

If we explore more from their metrics then we find that more than 1.2 million people now regularly connect to the Tor network to engage in online activities. That is up from just over 600,000 worldwide users in June of this year. Of those 600,000 new users, roughly ten percent are from the United States.
Below is the United States Graph:

Daily Traffic from United States is increasing by 17.25% and it is only the country, whose users are increasing more than 10%, it looks like Americans really under fear of NSA Prism and wants to keep their privacy secure.