| Volume (per unit1/annual reset) | Per Unit Fee |
| For the first 1 to 500,000 units | $0.49 |
| For units 500,001 to 1,000,000 | $0.38 |
| For units 1,000,001 to 2,000,000 | $0.31 |
| For units 2,000,001 to 5,000,000 | $0.26 |
| For units 5,000,001 to 10,000,000 | $0.21 |
| For units 10,000,001 to 20,000,000 | $0.12 |
| For units 20,000,001 to 50,000,000 | $0.10 |
| For units 50,000,001 or more | $0.075 |
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