| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,496 | $17,205 |
| 2016 | $23,740 | $18,043 |
| 2017 | $24,339 | $18,049 |
| 2018 | $24,339 | $17,904 |
| 2019 | $25,674 | $17,441 |
| 2020 | $25,864 | $17,631 |
| 2021* | $26,516 | $17,636 |
| 2022* | $27,184 | $17,642 |
| 2023* | $27,869 | $17,647 |
| 2024* | $28,571 | $17,652 |
| 2025* | $29,291 | $17,657 |
