| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,945 | $23,198 |
| 2016 | $27,412 | $23,880 |
| 2017 | $27,966 | $24,437 |
| 2018 | $27,966 | $24,647 |
| 2019 | $31,148 | $26,728 |
| 2020 | $32,655 | $28,235 |
| 2021* | $33,315 | $29,065 |
| 2022* | $33,988 | $29,920 |
| 2023* | $34,674 | $30,799 |
| 2024* | $35,375 | $31,705 |
| 2025* | $36,089 | $32,637 |