X2 issued callable bonds on January 1, 2018. The bonds pay interest annually on December 31 each year. X2's accountant has projected the following amortization schedule from issuance until maturity: Date Cash Paid Interest Expense Decrease in Carrying Value Carrying Value 1/1/2018 $114,015 12/31/2018 $13,750 $13,112 $638 113,377 12/31/2019 13,750 13,038 712 112,665 12/31/2020 13,750 12,956 794 111,872 12/31/2021 13,750 12,865 885 110,987 12/31/2022 13,750 12,763 987 110,000 What is the annual stated interest rate on the bonds?