| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,134 | $15,894 |
| 2016 | $26,208 | $16,579 |
| 2017 | $26,404 | $16,054 |
| 2018 | $26,404 | $16,328 |
| 2019 | $27,450 | $16,449 |
| 2020 | $27,658 | $16,657 |
| 2021* | $27,868 | $16,867 |
| 2022* | $28,080 | $17,079 |
| 2023* | $28,293 | $17,295 |
| 2024* | $28,508 | $17,513 |
| 2025* | $28,725 | $17,733 |