Where's George?

I received a $20 dollar bill in excellent condition that had a stamp on the back stating "Track this bill at www.wheresgeorge.com."

I went to the website and entered the serial number of the bill and was instructed to state whether I had possession of the bill and to write a comment. When I clicked Finish, I got these results.

Twenty Dollar Bill, Serial# JE152---59G Series: 2009
This bill has traveled at least 419 Miles in 25 Days, 7 Hrs, 39 Mins at an average of 17 Miles per day.
The bill is now 419 Miles from its starting location. This travel history below is in reverse-chronological order

Entry Time   (Local Time of Zip)  Location, State/Province Travel Time                       Average Distance         Speed
16-May-2015 10:03 PM            San Diego, CA                   25 Days, 7 Hrs, 39 Mins         419                         17
21-Apr-2015 02:24 PM             Sunnyvale, CA                   Initial Entry

It seems this bill came from Sunnyvale and took a bit of time to traverse the state.  It is pretty cool and you can register and this bill will be placed in your inventory and you can get messages of when it is registered again.  Hm...how many other $20 bills do I have?