| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,387 | $14,244 |
| 2016 | $20,727 | $14,204 |
| 2017 | $21,031 | $13,794 |
| 2018 | $21,031 | $13,793 |
| 2019 | $22,409 | $14,628 |
| 2020 | $22,409 | $14,628 |
| 2021* | $22,738 | $14,627 |
| 2022* | $23,073 | $14,625 |
| 2023* | $23,412 | $14,624 |
| 2024* | $23,756 | $14,622 |
| 2025* | $24,105 | $14,621 |