Bonds issued by Orange Pond Recreation were priced at $1,290.63 six months ago and are priced at $1,505.50 today. The bonds have a par value of $1,000, pay semi-annual coupons, and just made a coupon payment. The bonds had a return over the past six months (from 6 months ago to today) of 13.08 percent. What is the coupon rate of the bonds?