Blue Corporation issued bonds on January $1,2016.$ Blue's accountant has projected the following amortization schedule from issuance until maturity:

$\backslash$table$[[$Date$,\backslash$table$[[$Cash$],[$Payment$]],$Interest,Amort,$\backslash$table$[[$Outstanding$],[$Balance$]]],[\frac{1}{1}\frac{?}{2016},,,$$$482,815,],[\frac{6}{30}\frac{?}{2016},$$$15,000,$$$16,899,$$$1,899,484,714],[\frac{12}{31}\frac{?}{2016},$$$15,000,$$$16,965,$$$1,965,486,678],[\frac{6}{30}\frac{?}{2017},$$$15,000,$$$17,034,$$$2,034,488,712],[\frac{12}{31}\frac{?}{2017},$$$15,000,$$$17,105,$$$2,105,490,817],[\frac{6}{30}\frac{?}{2018},$$$15,000,$$$17,179,$$$2,179,492,996],[\frac{12}{31}\frac{?}{2018},$$$15,000,$$$17,255,$$$2,255,495,251],[\frac{12}{31}\frac{?}{2019},$$$15,000,$$$17,415,$$$2,415,500,000]]$

What is the stated $($coupon$)$ interest rate?