| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,144 | $14,098 |
| 2016 | $19,199 | $14,466 |
| 2017 | $19,539 | $14,646 |
| 2018 | $19,539 | $14,558 |
| 2019 | $19,058 | $10,443 |
| 2020 | $19,370 | $10,755 |
| 2021* | $19,426 | $10,888 |
| 2022* | $19,483 | $11,023 |
| 2023* | $19,539 | $11,160 |
| 2024* | $19,596 | $11,298 |
| 2025* | $19,652 | $11,439 |