| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,315 | $12,543 |
| 2016 | $24,135 | $11,857 |
| 2017 | $25,377 | $12,831 |
| 2018 | $25,377 | $12,906 |
| 2019 | $26,999 | $12,582 |
| 2020 | $27,498 | $13,081 |
| 2021* | $28,007 | $13,157 |
| 2022* | $28,525 | $13,233 |
| 2023* | $29,053 | $13,310 |
| 2024* | $29,590 | $13,387 |
| 2025* | $30,137 | $13,465 |