Age-specific rates from national mortality registers divided by UN WPP 2024 population for the matching country, year, sex and five-year band. The right-hand column counts every undetermined-intent death as a suicide — an upper bound, not an estimate.

age	as published	if undetermined counted	undet. share ♀	undet. share ♂
15-19	2.29	2.56	0.228	0.308
20-24	3.65	3.91	0.235	0.287
25-29	3.72	3.96	0.234	0.280
30-34	3.58	3.79	0.230	0.271
35-39	3.50	3.69	0.216	0.255
40-44	3.41	3.51	0.209	0.233
45-49	3.30	3.36	0.201	0.217
50-54	3.25	3.30	0.198	0.210
55-59	3.51	3.51	0.207	0.207
60-64	3.52	3.50	0.218	0.214
65-69	3.40	3.33	0.233	0.217
70-74	3.47	3.21	0.271	0.211
75-79	3.86	3.24	0.340	0.214
80-84	4.28	3.19	0.422	0.225
85-89	5.02	3.15	0.526	0.243
90-94	5.88	3.18	0.611	0.280
95-99	6.18	2.84	0.723	0.397

The bolded row is 55-59, where the gendered gap in undetermined coding crosses zero. Below it, young men's deaths are the ones more often filed as undetermined (0.228 against 0.308 at 15-19). Above it, the direction reverses and keeps widening.

	young (15-34)	oldest (80-99)	change
as published	3.31	5.34	+2.03
if undetermined counted	3.55	3.09	−0.46

At the oldest band the two accountings differ by more than the entire published rise. That gap is the finding: the pattern is smaller than the uncertainty it is drawn from.