The projected probability of becoming disabled before normal retirement age has decreased for insured men between the 1966 and 1993 cohorts [that is, people born in 1966 and 1993], but has increased for insured women. For the 1993 insured cohort, we project that the probability of surviving from age 20 to normal retirement age without ever being disabled is 64 percent for males and 69 percent for females. Comparable probabilities projected for the 1966 insured cohort are 58 percent for males and 70 percent for females. Between the 1992 and 1993 cohorts, the projected probability of death before normal retirement age decreased slightly for both sexes.
Jan 22, 2014
Incidence Of Disability Going Down
From a report by Social Security's Office of the Chief Actuary: