| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,178 | $17,410 |
| 2016 | $24,659 | $18,478 |
| 2017 | $24,800 | $18,608 |
| 2018 | $24,800 | $16,366 |
| 2019 | $24,870 | $15,175 |
| 2020 | $26,050 | $16,355 |
| 2021* | $26,198 | $16,469 |
| 2022* | $26,348 | $16,585 |
| 2023* | $26,498 | $16,701 |
| 2024* | $26,649 | $16,818 |
| 2025* | $26,801 | $16,935 |
