28 months, 16kg and severe rheumatoid arthritis and I'm STILL lifting him several times per day. He's only just started to climb into the car on his own (subaru forester, so it's a bit higher up than most, but not as much as a 4WD). I also still use a change table for him, because it's easier than getting myself to the floor and up again... and because it's what we've always done, he knows to stay still when he's up there. Baths, DH does... Or I just bring him into the shower with me - that way I don't have to lift him in or out. Still need to lift him in/out of shopping trolleys and the pram when we go out... if he's on foot, he'll do the flop and drop passive resistance thing, so it's just easier to avoid it. I suspect there will still be quite some lifting for quite some time, even though he's usually pretty good. He seems to know when I'm having a bad day and will often be super helpful and pick things up for me and all that, too.

BW