| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,322 | $17,389 |
| 2016 | $25,134 | $16,297 |
| 2017 | $25,440 | $14,419 |
| 2018 | $25,440 | $14,796 |
| 2019 | $27,728 | $17,004 |
| 2020 | $28,928 | $18,204 |
| 2021* | $29,281 | $18,679 |
| 2022* | $29,638 | $19,167 |
| 2023* | $30,000 | $19,667 |
| 2024* | $30,366 | $20,180 |
| 2025* | $30,736 | $20,707 |