1 leases on portions of the land used for these facilities expire on varying dates through 2062 . 2 leases expire on varying dates through 2030 and generally include renewals at our option . our principal executive offices are located in the u.s . and a majority of our wafer fabrication activities are also located in the u.s . we completed construction of development fabrication facilities in oregon during 2014 that we expect will enable us to maintain our process technology lead