let's open up to public cam unt. seeing no public comment, it is closed. mr. clerk call the next item >> item 12, discussion item, review of dem graphic experience study for july 1, 20 09-2014. >> [inaudible] good afternoon commissioners. dem ographic asemption, using a evaluation is a poncht part to measure how much money to put aside to pay for the promised benefits, rates of retirement, disability, moore taelt, what percent of members are married, how many have a domestic partner, job bromotion kwr marriage increase, [inaudible] how large we expect those benefits to be and how long we expect to pay those benefits. [inaudible] the last study present today the board in 2010. i called out the dem ographic assumption because the recommended moore taelt changes have the largest impact on cost, larger than any of the other changes put together. i would like the note that i showed stats on a survey done by the center of retirement research that 22 of 150 national public systems use generational mooretalities projection and improvement and that is from a 2013 datab