| μg/m³ | Country | % Correct |
|---|---|---|
| 6.07 | Sweden | 92%
|
| 5.38 | Finland | 91%
|
| 6.38 | Norway | 91%
|
| 5.48 | Iceland | 89%
|
| 7.42 | New Zealand | 86%
|
| 9.33 | Australia | 84%
|
| 6.23 | Canada | 84%
|
| 7.89 | Ireland | 74%
|
| 7.18 | United States | 71%
|
| 6.84 | Estonia | 69%
|
| 6.03 | Nauru | 69%
|
| 7.75 | Palau | 67%
|
| 6.01 | Tuvalu | 67%
|
| 7.98 | Portugal | 63%
|
| 9.35 | Spain | 62%
|
| 9.01 | Andorra | 57%
|
| 8.46 | Luxembourg | 53%
|
| 9.43 | Seychelles | 47%
|
| 9.28 | Mauritius | 43%
|
| 7.87 | St. Kitts and Nevis | 41%
|
| 7.95 | Brunei | 26%
|