| countries | average(μSv/h) | maximum(μSv/h) |
| Japan | 0.049 | 0.143 |
| China | 0.062 | 0.342 |
| Yangjiang（Cnina) | 0.400 | 0.616 |
| HongKong | 0.076 | 0.114 |
| India | 0.055 | 1.100 |
| Kerala（India) | 0.433 | 4.000 |
| Ramsar（Iran） | 1.160 | 29.700 |
| Austria | 0.042 | 0.152 |
| Italy | 0.057 | 0.500 |
| Germany | 0.054 | 0.433 |
| Denmark | 0.037 | 0.051 |
| France | 0.068 | 0.251 |
| Ireland | 0.041 | 0.180 |
| Norway | 0.072 | 1.200 |
| America | 0.045 | 0.100 |
| Garapari（Brazil) | 0.627 | 4.000 |
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