I don't have stats for you, but my lifting partner (male) just turned 75. He's not setting
PR's, but he certainly stays fit and active, and retains a lot more strength/muscle than if he stopped lifting... When I got him into a new/better program (and reduced his reliance on machines and bicep curls) about 4-5 years ago, he actually saw increases in size/strength at that point.
The main limitations he has are related to poor flexibility (and despite doing mobility warmups with me, he tends to not follow through with this kind of work on his own) and some back issues (arthritis) that eliminates moves like deadlifts.