octa nona century jinde

 a

Age Transition	Estimated Survival Probability	Interpretation
80 → 85	~55–65%	Most reach mid‑80s.
80 → 90	~25–35%	Only about 1 in 3 reach 90.
90 → 95	~10–15%	Very few reach 95.
95 → 100	<5%	Centenarians remain rare.