If I have a series EE savings bond for $100, and it was purchased on January 24, 1991, how much is it worth now?

The today value of series EE savings bond with face value of $100 issued on January 1991 is $139.56.The rate now is 4.00%.
Updated on Sunday, February 05 2012 at 05:34PM EST
Collections: face valuejanuary 24