| 3. | INVESTMENT INCOME |
| UNITED STATES DOLLAR | ||||||||||||
| 2017 | 2016 | 2015 | ||||||||||
| Restated1 | Restated1 | |||||||||||
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Interest received – environmental trust funds |
0.5 | 1.0 | 0.4 | |||||||||
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Interest received – cash balances |
5.1 | 7.3 | 5.9 | |||||||||
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Total investment income |
5.6 | 8.3 | 6.3 | |||||||||
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