Millerverse timeline
2000 -- Bruce is 25, he becomes Batman
2008 -- Bruce is 33, he takes Dick in in March (Dick is 12 for a few weeks and turns 13 the night before he nearly kills GL)
2014 -- Dick gets fired; Jason is taken in a few months later (he is probably 13)
2017 -- Jason gets killed at probably 16? Bruce retired in ANGST (he is 42)
2030 -- 13 years later, Carrie shows up, Bruce is 55, and we're into DKR
2033 -- Carrie is 16, Bruce is 58, Dick is.... a monster and 37
2008 -- Bruce is 33, he takes Dick in in March (Dick is 12 for a few weeks and turns 13 the night before he nearly kills GL)
2014 -- Dick gets fired; Jason is taken in a few months later (he is probably 13)
2017 -- Jason gets killed at probably 16? Bruce retired in ANGST (he is 42)
2030 -- 13 years later, Carrie shows up, Bruce is 55, and we're into DKR
2033 -- Carrie is 16, Bruce is 58, Dick is.... a monster and 37