Table 3. Distribution of estimated external doses by age groups.

Effective dose (mSv)	Number of respondents (excluding radiation workers) by age groups (years)									Total
	0–9	10–19	20–29	30–39	40–49	50–59	60–69	70–79	80–
<1	40,902	36,957	19,572	31,397	26,403	30,692	34,125	24,373	16,719	261,140
1–2	19,529	17,869	9,374	16,982	15,813	17,861	18,719	11,854	6,847	134,848
2–3	5,289	3,297	1,032	2,151	2,087	2,789	3,231	1,904	820	22,600
3–4	216	137	76	147	143	224	216	156	67	1,382
4–5	19	45	36	40	76	90	77	72	39	494
>5	23	31	51	77	99	220	196	157	76	930
Total	65,978	58,336	30,141	50,794	44,621	51,876	56,564	38,516	24,568	421,394