The number of ultimate rates of mortality decline has changed over time. Between 1982 and 2011, the number chosen equaled 210 (5 broad age groups x 2 sexes x 7 causes of death x 3 cost scenarios). Since 2012, SSA reduced the number of causes of death from 7 to 5, applied uniform ultimate rates of decline for males and females, and uniformly scale the ultimate rates of decline for the low and high cost as ½ and 5/3 of the set of intermediate cost rates of decline.