Performance Management Ratios
| 2006 | 2005 | |
| Return on average Unitholders' equity (%) | 23 | 28 |
| Return on average productive capital employed1 (%) | 24 | 37 |
| 1Calculated as net income before net interest expense, foreign exchange and future income taxes, divided by average productive capital employed, which excludes major expansion projects not yet in use. | ||
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