During the first six months of 2019, we received proceeds of $601 million in aggregate from the sale of bonds issued by the Industrial Development Authority of the City of Chandler, Arizona (the Arizona bonds) and the State of Oregon Business Development Commission (the Oregon bonds). The bonds are our unsecured general obligations in accordance with loan agreements we entered into with the Industrial Development Authority of the City of Chandler, Arizona and the State of Oregon Business Development Commission. The bonds mature in 2049 and carry an interest rate of 5.0%. The Arizona bonds and the Oregon bonds are subject to mandatory tender in June 2024 and March 2022, respectively, at which time we can re-market the bonds as either fixed-rate bonds for a specified period or as variable-rate bonds until another fixed-rate period is selected or until their final maturity date.