Table 3 Mesothelioma and calendar year.

Calendar year (years since exposure*)	No. mesotheliomas		Total†		Cohort‡		Person‐years‡	Mesothelioma rate‡§
	Total†	Cohort‡	PT	PL	PT	PL
1956–60 (16)	0	0	0	0	0	0	5134	0
1961–65 (21)	4	3	2	2	1	2	4982	60
1966–70 (26)	5	5	1	4	1	4	4741	105
1971–75 (31)	14	10	4	10	3	7	4341	230
1976–80 (36)	11	8	3	8	2	6	3768	212
1981–85 (41)	10	7	3	7	2	5	3167	221
1986–90 (46)	14	7	2	12	1	6	2582	271
1991–95 (51)	7	5	3	4	2	3	1925	260
1996–00 (56)	0	0	0	0	0	0	1334	0
2001–03 (60)	0	0	0	0	0	0	604	0
Total	65	45	18	47	12	33	32578	138.1

*Average time from midpoint of production period (1940–44) to midpoint of calendar year range.

†Total number in 1154 former workers.

‡In cohort of 1061 workers with known duration of employment.

§Rate per 100 000 person‐years at risk.

PT, peritoneal; PL, pleural.