| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $15,355 | $11,974 |
| 2016 | $15,559 | $12,258 |
| 2017 | $16,008 | $12,269 |
| 2018 | $16,008 | $12,296 |
| 2019 | $15,395 | $11,514 |
| 2020 | $16,334 | $12,453 |
| 2021* | $16,551 | $12,480 |
| 2022* | $16,771 | $12,508 |
| 2023* | $16,994 | $12,535 |
| 2024* | $17,220 | $12,563 |
| 2025* | $17,449 | $12,591 |
