.25% ( 6.25 % ) and varying rates on our international plans of between 2.25% ( 2.25 % ) and 8.25% ( 8.25 % ) . the pre-retirement rate for our domestic plans is based on a bond portfolio that includes only long-term bonds with an aa rating , or equivalent , from a major rating agency . we believe the timing and amount of cash fl ows related to the bonds included in this portfolio is expected to match the esti- mated defi ned benefi t payment streams of our domestic plans