| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,137 | $16,291 |
| 2016 | $26,063 | $16,372 |
| 2017 | $26,491 | $17,285 |
| 2018 | $26,491 | $17,536 |
| 2019 | $27,866 | $18,478 |
| 2020 | $27,807 | $18,419 |
| 2021* | $28,263 | $18,686 |
| 2022* | $28,727 | $18,957 |
| 2023* | $29,198 | $19,232 |
| 2024* | $29,677 | $19,511 |
| 2025* | $30,163 | $19,794 |